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The prevention, detection and management of cancer treatment-induced cardiotoxicity: a meta-review

BMC Cancer volume 15, Article number: 366 (2015) Cite this article

Abstract

Background

The benefits associated with some cancer treatments do not come without risk. A serious side effect of some common cancer treatments is cardiotoxicity. Increased recognition of the public health implications of cancer treatment-induced cardiotoxicity has resulted in a proliferation of systematic reviews in this field to guide practice. Quality appraisal of these reviews is likely to limit the influence of biased conclusions from systematic reviews that have used poor methodology related to clinical decision-making. The aim of this meta-review is to appraise and synthesise evidence from only high quality systematic reviews focused on the prevention, detection or management of cancer treatment-induced cardiotoxicity.

Methods

Using Cochrane methodology, we searched databases, citations and hand-searched bibliographies. Two reviewers independently appraised reviews and extracted findings. A total of 18 high quality systematic reviews were subsequently analysed, 67 % (n = 12) of these comprised meta-analyses.

Results

One systematic review concluded that there is insufficient evidence regarding the utility of cardiac biomarkers for the detection of cardiotoxicity. The following strategies might reduce the risk of cardiotoxicity: 1) The concomitant administration of dexrazoxane with anthracylines; 2) The avoidance of anthracyclines where possible; 3) The continuous administration of anthracyclines (>6 h) rather than bolus dosing; and 4) The administration of anthracycline derivatives such as epirubicin or liposomal-encapsulated doxorubicin instead of doxorubicin. In terms of management, one review focused on medical interventions for treating anthracycline-induced cardiotoxicity during or after treatment of childhood cancer. Neither intervention (enalapril and phosphocreatine) was associated with statistically significant improvement in ejection fraction or mortality.

Conclusion

This review highlights the lack of high level evidence to guide clinical decision-making with respect to the detection and management of cancer treatment-associated cardiotoxicity. There is more evidence with respect to the prevention of this adverse effect of cancer treatment. This evidence, however, only applies to anthracycline-based chemotherapy in a predominantly adult population. There is no high-level evidence to guide clinical decision-making regarding the prevention, detection or management of radiation-induced cardiotoxicity.

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Background

Numerous factors, such as the introduction of screening programs to facilitate early detection [1, 2], improved diagnostic imaging, advances in therapy and the implementation of multidisciplinary cancer care [3], have contributed to improved cancer survival rates over recent decades [4, 5]. Advances in chemo- and radiotherapy have had the most impact on cancer survival [6]. The benefits associated with some cancer treatments, however, do not come without risk. A devastating side effect of some common cancer treatments is cardiotoxicity-principally heart failure. The risk of cardiotoxicity varies according to the type and intensity of cancer treatment. Heart failure incidence rates associated with the commonly-prescribed chemotherapy agents include 0.14–48 % for anthracyclines (estimated risk for doxorubicin dose > 400 mg/m [2] ranges from 0.14 % to 5 %; for 550 mg/m2 it ranges from 7 % to 26 %, and for 700 mg/m2 the estimated risk ranges from 18 % to 48 %) [7]. For high dose cyclophosphamides the risk ranges from 7 to 28 % for high-dose cyclophosphamides [8]. The risk is 1 % for trastuzamab (while 5 % of patients develop systolic dysfunction, only 1 % develop symptomatic cardiomyopathy) [7, 9]; and 8 to 12.5 % for tyrosine kinase inhibitors [10, 11]. Cardiotoxicity, which can occur up to 20 years after treatment [12, 13] is likely to become even more prevalent as the cancer population ages and novel, so-called ‘targeted’ treatment regimens that cause damage to cardiac myocytes are more commonly employed. Concomitant chest irradiation in blood, breast and lung cancers is also implicated in cardiotoxicity [14].

Growing recognition of the longer-term public health implications of this problem, which is expected to increase as more people successfully complete acute cancer treatment, has resulted in a great deal of research in this field. Two key strategies are commonly utilised to support implementation of evidence into clinical practice; clinical practice guidelines and literature reviews (including both systematic and non-systematic review methodology). Guidelines for preventing, monitoring and treating cancer treatment-induced cardiotoxicity are available [8]. Non-systematic reviews have been published to support clinical practice and research related to cancer treatment-induced cardiotoxicity [15]. In addition, a number of systematic reviews have been published on this issue. However, critical appraisal and synthesis of systematic reviews and meta-analyses is needed in order to ensure that decision-making is informed by the best available accumulated evidence [16]. The ‘meta-review’ employs a unique review methodology in which the findings presented in individual systematic reviews and meta-analyses are appraised and synthesized. Methods similar to a traditional systematic review, such as comprehensive literature searches and quality assessment by two reviewers, are used. The difference between a traditional systematic review, which may or may not also incorporate meta-analysis, is that a meta-review only considers results reported in systematic reviews and meta-analyses, not results from individual studies. We conducted a meta-review of the systematic reviews and meta-analyses that have addressed the important issue of cancer treatment-induced cardiotoxicity. Our aim was to appraise and synthesise the systematic reviews that have focused on the prevention, early detection and management of cancer treatment-induced cardiotoxicity in order to aid policy and practice decision-making.

Methods

Cochrane methodology was used to appraise and synthesise systematic reviews in this field [6]. Our meta-review included a comprehensive literature search. The relevant reviews identified were then analysed by categorising and comparing the populations, interventions, comparisons and outcomes that were reported for each review. In addition, the quality of each review was appraised using a validated tool [16].

Information sources and search strategy

The following databases were searched: CINAHL; Cochrane Database of Systematic Reviews; Joanna Briggs Institute library of systematic reviews; EMBASE; Health source nursing/academic edition; and MEDLINE. The database searches were supplemented with manual searching of reference lists plus a forward citation search using Google Scholar. Only reviews published in peer-reviewed journals were included in this review [17]. Census dates from January 1996 and October 2013 (inclusive) were set for all literature searches. Only articles written in full-text English were included [18]. Potentially relevant publications were retrieved in full-text for review purposes. The search used Boolean operators to combine free text terms and/or MeSH terms including cardiotoxicity and systematic review. An example of the search terms used in one of the databases searched is presented in Additional File 1.

Study selection

Titles and abstracts were screened to eliminate irrelevant articles. Potentially eligible publications were retrieved and the full text version was reviewed in detail. Two reviewers independently selected studies for inclusion with a third independent reviewer was available for arbitration. Inclusion and exclusion criteria for this meta-review are outlined in Table 1.

Table 1 Inclusion and exclusion criteria for systematic reviews in this meta-review
Full size table

Data extraction

In addition to extracting data to describe the characteristics of each systematic review, such as the number of studies included, year of publication and the total number of participants, data about the populations, interventions, comparisons and outcomes were extracted. These data were extracted with a standardised form developed specifically for this study by two reviewers.

Quality appraisal

All potentially relevant reviews were appraised by two independent reviewers for their quality and risk of bias using the validated AMSTAR tool [16]. The 11 items of the AMSTAR were developed by building on empirical data collected with previously developed tools and with expert opinion. As such, the AMSTAR provided a valid, standardised method to assess the quality of methods used to search the literature and combine results, as well as the comprehensiveness that results of the reviews were reported [7]. Importantly, the AMSTAR criteria also provided a standardised method to determine the extent to which the scientific quality of the studies was assessed in the systematic reviews. The Cochrane Collaboration specify this as an important element to include in the preparation of a Cochrane overview of reviews [19]. Our definition of ‘high-quality’ was a review that addressed at least 7 of the 11 AMSTAR criteria. We deemed that setting a cut-off for the total score to indicate quality was appropriate, as psychometric testing of the AMSTAR tool revealed that, as each component score measures a different domain of quality, the summary score is meaningful [20]. Detailed results of appraisal of all relevant systematic reviews are presented in Additional File 2.

Data synthesis

Data extracted from the systematic reviews were categorised and presented in tables and forest plots. Summary findings are presented in a narrative synthesis.

Results

Overall, 31 publications from 352 citations were identified as potentially relevant. Of note, 11 relevant systematic reviews were judged to be of poor quality according to the AMSTAR criteria and were therefore excluded from this meta-review. Eighteen systematic reviews fulfilled the inclusion and exclusion criteria (Fig. 1).

Fig. 1
figure 1

Prisma flow chart - search results

Full size image

Systematic review characteristics

The majority of reviews included randomized controlled trials [21–35], with only two reviews (11 %) also including prospective cohort designs [36, 37] (Table 2). The mean number of studies included in the reviews was 14.9 (range = 2–55). The majority of the systematic reviews (n-12; 67 %) pooled results from individual studies for meta-analysis [21–26, 28, 30–33]. The reviews that did not use meta-analysis used a narrative approach to synthesise the findings (n = 6; 33 %) [27, 34–38]. The systematic reviews were published from 2004 to 2013.

Table 2 Characteristics of included reviews
Full size table

Key findings from systematic reviews

Detection of cancer treatment-induced cardiotoxicity

Only one systematic review focused on interventions to detect cancer treatment-induced cardiotoxicity [36]. This systematic review identified one randomized controlled trial and six cohort studies that investigated the role of cardiac biomarkers, such as brain natriuretic peptide, in the early detection of cardiotoxicity in children who received anthracycline therapy [36]. The authors reported that the overall quality of the evidence was poor, due to a lack of randomized controlled trials and small sample sizes [36]. Based on these findings, the authors of the systematic review concluded that no clear recommendations for practice could be made regarding the use of cardiac biomarkers for the early detection of anthracycline-induced cardiotoxicity [36]. However, it is important to note that this review was published in 2007, with the literature search only current to January 2006.

Prevention of cancer treatment-induced cardiotoxicity

The majority (n = 16; 89 %) of the systematic reviews investigated strategies to prevent cancer treatment-induced cardiotoxicity [21–35, 37]. These reviews were further categorized into the following: Prevention of

  1. 1.

    Cardiotoxicity specifically associated with breast cancer treatment [21–26]

  2. 2.

    Cardiotoxicity specifically associated with prostate cancer treatment [27];

  3. 3.

    Anthracycline-induced cardiotoxicity in adult cancer patients [28, 30–33]

  4. 4.

    Cardiotoxicity through dietary supplementation [34]; and

  5. 5.

    Cancer treatment-induced cardiotoxicity in children [28, 35, 37].

Prevention-focused systematic reviews reported clinical cardiotoxicity, defined as the diagnosis of heart failure by a physician or a decline in left ventricular ejection fraction below 40 %, and sub-clinical cardiotoxicity. Definitions of sub-clinical cardiotoxicity varied considerably across reviews. For example, reviews used histological [30, 31], electrocardiographic [34] or echocardiographic [30–32] measurements to identify the presence of myocardial necrosis as a marker of sub-clinical cardiotoxicity.

The forest plot presented in Fig. 2 displays the results from meta-analyses that examined the effectiveness of different chemotherapy regimens or cardioprotective agents in the prevention of clinical cardiotoxicity. Differences between systematic reviews in their definition of what constituted sub-clinical cardiotoxicity precluded the formation of a similar figure for this outcome.

Fig. 2
figure 2

Summary of meta-analyses of included systematic reviews with clinical heart failure as the outcome

Full size image

Prevention of cardiotoxicity associated with breast cancer treatment

Two of the breast cancer systematic reviews focused on taxane-based chemotherapy [21, 22]. In one pooled analysis of the results of 7 trials, there was no statistically significant difference in the rate of cardiotoxicity between adjuvant chemotherapy regimens with or without taxanes in women with early or operable breast cancer (OR 0.95; 95 % CI = 0.67–1.36) [21]. An earlier systematic review, which also examined the adverse effects of taxane-based adjuvant chemotherapy in women with early breast cancer, produced similar results [22]. Meta-analysis of 6 trials including 11,577 patients of adjuvant chemotherapy including a taxane revealed that the risk for development of cardiotoxicity was 11 per 1,000 (95 % CI = 6–18) [22]. In comparison, the risk for cardiotoxicity in women with early breast cancer who received adjuvant chemotherapy without a taxane was 12 per 1,000 [22]. The relative risk was 0.9 (95 % CI = 0.53–1.54) [22]. Of note, the chemotherapy regimens of control and intervention arms of the studies included in the meta-analyses contained anthracyclines [21, 22]. As there were no differences in the rate of cardiotoxicity between participants who did and did not receive taxanes, it would appear that the rates of cardiotoxicity were likely due to the use of anthracyclines.

A specific focus of two further systematic reviews that examined the prevention of cardiotoxicity associated with breast cancer treatment investigated the impact of anti-human epidermal growth factor receptor 2 (HER-2) therapy [23, 24]. One systematic review aimed to determine whether there was an increased risk of cardiotoxicity in breast cancer patients treated with dual HER-2 blockade (pertuzumab plus trastuzumab, or trastuzumab plus lapatanib) compared to monotherapy (lapatanib or trastuzumab or pertuzumab) [24]. No statistically significant difference in the likelihood of developing clinical heart failure or of decline in left ventricular ejection fraction was identified [24]. The authors concluded that the evidence supported the use of dual therapy in this population with no adverse cardiac effects. The second breast cancer systematic review focused on the anti-HER-2 medication trastuzumab [23]. Meta-analysis indicated that the odds of developing cardiotoxicity were 2.45 times higher (95 % CI = 1.89–3.16) in subjects prescribed trastuzumab [23]. However, overall mortality, recurrence and mortality rates were decreased in subjects who received trastuzamab despite their higher odds of developing post-treatment cardiac symptoms. [23] Close monitoring of cardiac function was recommended, based on these findings.

A systematic review of randomized controlled trials of dose-dense anthracycline-based chemotherapy in early breast cancer, comprising a meta-analysis that combined n = 1,310 patients, revealed that women who received a dose-dense chemotherapy regimen were not more likely to develop cardiotoxicity (OR = 0.5; 95 % CI = 0.05–5.54) [25]. Trials of dose-dense chemotherapy were defined in this review as the same type and total amount of the drug administered over a shorter interval of time [25]. A further systematic review focused on anthracycline regimens for metastatic breast cancer [26]. The authors recommended careful consideration regarding the use of anthracyclines in this population due to the increased likelihood of developing cardiotoxicity (OR = 5.17; 95 % CI = 3.16–8.48) [26].

Prevention of cardiotoxicity associated with prostate cancer treatment

One systematic review addressed the issue of cardiotoxicity associated with treatment for hormone-refractory prostate cancer [27]. While 47 trials met the inclusion criteria for this review, the chemotherapy regimens investigated were too dissimilar to conduct meta-analysis [27]. No specific recommendations for the prevention of cardiotoxicity in this population were noted by the authors of this review.

Prevention of anthracycline-induced cardiotoxicity in adult cancer patients

In a systematic review of cardioprotective agents used during anthracycline therapy, the authors concluded that of the eight different agents for which there were randomized controlled trials, only dexrazoxane could be recommended for clinical practice [29]. Conflicting recommendations were provided in another systematic review by Smith et al. [32], which concluded that the evidence was not sufficiently robust to support the routine use of any particular cardioprotective agent, nor a liposomal formulation or alternative anthracycline treatment regimen. In regard to the use of anthracycline derivatives, a 2010 systematic review by van Dalen et al. came to a similar conclusion, suggesting that further research is needed to provide recommendations regarding the use of these alternative chemotherapy regimens [30].

Anthracycline administration considerations were examined for their potential association with cardiotoxicity in a second systematic review by van Dalen [31]. This review identified that continuous anthracycline infusion (>6 h) rather than bolus injection reduced the risk of cardiotoxicity [31]. No differences were observed in the rate of cardiotoxicity as a result of different doxorubicin peak doses [31].

A recently published review (2013) by Itchaki focused on anthracycline use in people receiving treatment for advanced follicular lymphoma [33]. Due to the increased risk ratio for cardiotoxicity (4.55; 95 % CI = 0.92-22.49) associated with anthracycline treatment in this population, the authors concluded that evidence of the benefit of anthracyclines in this population is limited [33].

Dietary supplementation

One systematic review appraised randomized and non-randomized studies that reported the use of coenzyme Q10 (CoQ10) to reduce the adverse effects of cancer treatment [34]. Only three randomized controlled trials, which included a total of 140 patients, investigated the effects of CoQ10 on cardiotoxicity [34]. These trials were not subjected to meta-analysis. The authors of the systematic review concluded that CoQ10 could provide some protection against cardiotoxicity during cancer treatment based on the fact that significant differences in electrocardiographic measurements were identified between control and CoQ10 groups [34]. However, using CoQ10 in clinical practice was not recommended, due to insufficient data [34].

Prevention of cancer treatment-induced cardiotoxicity in children

All of the systematic reviews that focused on the prevention of cardiotoxicity in children addressed this issue as it related to anthracycline-based chemotherapy. Sieswerda et al. [37] concluded that randomized controlled trials are needed to increase understanding of the benefits and risks of liposomal anthracyclines in children, as the evidence to date solely consists of observational studies [37]. In a further systematic review, meta-analysis of two randomized controlled trials revealed no statistically significant difference in the risk of cardiac death (RR = 0.4; 95 %CI = 0.04–3.89) or heart failure (RR = 0.33; 95 %CI = 0.01–8.02) in children who received anthracyclines [28]. However, the total number of participants in the randomized controlled trials was small (n = 410) [28]. As such, no firm conclusions regarding the implications for clinical practice were drawn from this analysis. A further systematic review focused on cardioprotection in children who received anthracyclines [35]. Based on the fact that only four randomized controlled trials with methodological limitations met the inclusion criteria, the authors concluded that there was limited evidence to guide cardioprotective therapies in this population and definitive recommendations for practice could not be made [35].

Management of cancer treatment-induced cardiotoxicity

Only one systematic review focused on interventions to treat cancer treatment-induced cardiotoxicity [38]. This review focused on the treatment of anthracycline-induced cardiotoxicity in children. Only two randomized controlled trials, which enrolled a total of 203 patients, were included in this review. The two interventions tested were enalapril and phosphocreatine. While the participants who received enalapril were less likely to experience decline in cardiac function, the difference between groups was not statistically significant (p < 0.5). Moreover, participants who received enalapril were more likely to experience hypotension, dizziness and fatigue. Therefore, the authors concluded that the benefits of this therapy be weighed against the greater risk of side effects in children with asymptomatic cardiotoxicity [38]. Conclusions regarding the use of phosphocreatine could not be made due to the high risk of bias. The authors of the review concluded that further high quality randomized controlled trials are required in this field [38].

Discussion

This aim of this meta-review was to appraise and synthesise the systematic reviews that have focused on the prevention, early detection and management of cancer treatment-induced cardiotoxicity in order to aid policy and practice decision-making. Based on the 18 systematic reviews included in this meta-review that were deemed to be high quality according to the AMSTAR criteria, the following conclusions can be drawn. First, there is insufficient evidence to draw firm conclusions regarding the utility of cardiac biomarkers for the detection of cancer treatment-induced cardiotoxicity. Based on conclusions drawn from systematic reviews focused on prevention, the following strategies could reduce the risk of cardiotoxicity: 1) The concomitant administration of dexrazoxane with anthracylines; 2) The administration of continuous anthracyclines, preferably for longer than 6 h, rather than bolus dosing; and 3) The administration of anthracycline derivatives such as epirubicin or liposomal-encapsulated doxorubicin instead of doxorubicin. In this context, it should be noted that while dexrazoxane is listed in the relevant pharmaceutical benefits scheme in some countries for this indication (e.g. it is listed as such by the FDA in the USA), in others such as Australia it is not. Hence its routine use would be problematic in some countries, as it would be hard to procure and expensive for patients who already incur considerable treatment overheads. In addition, in many high volume chemotherapy facilities it is not logistically possible to deliver anthracyclines over an extended period. In the facilities in which this review team work, for example, 30 min of infusion via a 100 ml minibag is the norm for reasons of economy and patient throughput.

There is limited evidence pertaining to the effectiveness of interventions to manage cancer treatment-induced cardiotoxicity. While two different medical interventions were identified in a systematic review that focused on treatment strategies for cardiotoxicity in childhood cancer (enalapril and phosphocreatine), neither was associated with statistically significant improvement in ejection fraction or mortality.

The largest number of systematic reviews included in this meta-review addressed the prevention of cancer therapy-induced cardiotoxicity. As demonstrated in Fig. 2, few strategies appear to reduce the risk of developing clinical heart failure. These included the avoidance of anthracycline-based chemotherapy (which is routine where cardiac risk before therapy is known), the use of doxorubicin derivatives, a longer anthracycline infusion duration and concomitant administration of the cardioprotective agent dexrazoxane. Of note, all meta-analyses that revealed statistically significant reductions in the rate of clinical heart failure related specifically to the use of anthracyclines. This is not surprising, considering anthracyclines are the focus of the greatest amount of research in this particular field [7]. However, our meta-review identified that the Level 1 evidence from meta-analyses focused on the prevention of cardiotoxicity was derived from a relatively small number of trials and in most cases, less than one thousand participants in total. Therefore, despite the fact that the cardiotoxic effects of this particular chemotherapy regimen have been known for a considerable time, there are still gaps in the evidence regarding how to facilitate early detection and management. In particular, the evidence for strategies that protect children with cancer from developing cardiac complications associated with their treatment is lacking [35].

Of note, one previous overview of systematic reviews on the topic of cancer treatment-induced cardiotoxicity has been published [39]. However, this review was smaller in scope than the present review. It focused only on the prevention of cardiotoxicity associated with anthracycline treatment in the paediatric population [39]. Furthermore, only reviews registered by the Cochrane Collaboration were included in van Dalen et al’s systematic review [39]. Excluding all other reviews is an effective strategy to ensure only high quality systematic reviews when detailed quality appraisal is not employed as part of the meta-review process [40]. It is possible however that systematic reviews not registered with the Cochrane Collaboration will meet many AMSTAR criteria, indicating that sufficient processes were undertaken to ensure potential sources of bias associated with the systematic review process were avoided. Therefore, including only Cochrane reviews in a meta-review is not the optimal choice when quality appraisal is included as part of the meta-review process.

In regard to the quality of the systematic reviews that reported data on cardiotoxicity, this meta-review identified that: 1) the methodology used in a considerable number of systematic reviews was poor (n = 11; 35 % of the potentially relevant reviews were excluded due to low quality according to the AMSTAR criteria); and 2) half of the systematic reviews not registered with the Cochrane Collaboration were of high quality (n = 9; 50 % of reviews that met more than 7 of the AMSTAR criteria were not Cochrane reviews). Based on these findings, it is recommended that future meta-reviews that focus on the prevention, detection and management of cancer treatment-induced toxicities should not include only Cochrane reviews, as high-quality systematic reviews that potentially contain unbiased and important recommendations for practice could be overlooked. However, quality appraisal of the systematic reviews would be required to ensure biased conclusions from systematic reviews that have used poor methodology are avoided.

Specific deficiencies in Level 1 evidence for the detection, prevention and management of cancer therapy-induced cardiotoxicity were identified in this meta-review. Only one high quality systematic review of dietary supplementation was identified, which was published in 2004. Recommendations for practice regarding interventions for the detection of cancer treatment-induced cardiotoxicity were not able to be drawn from this meta-review. However, we have identified that an updated systematic review focusing on the detection of cardiotoxicity is required to help inform clinical practice, as the only previous high quality review included evidence up to January 2006. No Level 1 evidence is available to guide clinical decision-making regarding the prevention, detection or management of radiation-induced cardiotoxicity. While the role of chest irradiation in inducing cardiotoxicity has been known for some time, studies to date have focused on minimizing the dose of radiation to the heart that are not powered to detect clinical differences in the rate of cardiotoxicity [14]. The small number of primary research studies undertaken to investigate strategies to prevent radiation-induced cardiotoxicity is likely the reason why no systematic reviews were identified in our literature search. While an evidence base about the potential effectiveness of exercise as an intervention to aid prevention of cancer treatment-induced cardiotoxicity is also emerging, similarly, no systematic reviews of the effectiveness of this intervention were identified in our comprehensive search of the literature. Based on the positive results observed in animal studies, it is likely that human clinical trials of exercise for the prevention of cardiotoxicity associated with cancer treatment will be reported in the future [41].

Limitations

It should be noted that only English language reviews were included in our meta-review. However, we considered this to be acceptable because sensitivity testing regarding information published in languages other than English has shown that English language reviews represent a robust view of the available evidence base in health areas [35]. A considerable strength of this meta-review is that we were able to reduce the risk of bias from our conclusions regarding the prevention, detection and management of cancer-treatment induced cardiotoxicity by including only systematic reviews that had considered the quality of included studies in making decisions about the validity of the evidence, as well as the suitability of the included trials for meta-analyses. No attempts were made to combine data from multiple systematic reviews, due to the substantial degree of heterogeneity between the populations, interventions and outcomes investigated. As is the case for all meta-reviews, it should be noted that evidence from recent studies that were not included in the systematic reviews was not able to be considered in our review. For this reason, the majority of evidence regarding the detection, prevention and management of cancer treatment-induced cardiotoxicity included in this meta-review is from studies conducted at least 5 years ago. Another important point to note is that absolute risk of cardiotoxicity was not reported in meta-analyses due to heterogeneity between individual studies.

Conclusion

This meta-review has highlighted the paucity of high level evidence to guide clinical practice decision-making regarding the detection and management of cancer treatment associated cardiotoxicity. There is a greater amount of evidence available to guide practice in regard to the prevention of this adverse effect of cancer treatment. It is important to note, however, that the meta-analyses that revealed statistically significant reductions in clinical cardiotoxicity only applied to anthracycline based chemotherapeutic regimens. No high-level evidence is available to guide clinical decision-making regarding the prevention, detection or management of radiation-induced cardiotoxicity.

Abbreviations

CoQ10:

Coenzyme Q10

HER-2:

Anti-human epidermal growth factor receptor 2

cTnT:

Cardiac troponin T

ANP:

Atrial natriuretic peptide

NT-BNP:

N-terminal nrain natriuretic peptide

ACR:

Anthacyclines

LVEF:

Left ventricular ejection fraction

HF:

Heart failure

95 % CI:

95 % Confidence interval

RR:

Relative risk

OR:

Odds ratio

HR:

Hazard ratio

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Acknowledgements

This review was funded by a Seeding Grant from the Faculty of Health Sciences, Flinders University and an IHBI MCR grant from the Queensland University of Technology.

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Authors and Affiliations

  1. School of Nursing, Institute of Health and Biomedical Innovation, Queensland University Technology, Kelvin Grove Campus, Kelvin Grove, QLD, 4059, Australia

    Aaron Conway

  2. Division of Cancer Services, Princess Alexandra Hospital and School of Nursing, Institute of Health and Biomedical Innovation, Queensland University Technology, Kelvin Grove Campus, Kelvin Grove, QLD, 4059, Australia

    Alexandra L McCarthy

  3. Nursing Research & Practice Development Unit The Prince Charles Hospital and School of Nursing, Midwifery and Paramedicine, Australian Catholic University, Brisbane, QLD, Australia

    Petra Lawrence

  4. School of Nursing and Midwifery, Flinders University, 5042 GPO Box 2100,, Sturt Road, Bedford Park, Adelaide, 5001, South Australia

    Robyn A Clark

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Correspondence to Robyn A Clark.

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Competing interests

The authors declare that they have no competing interest.

Authors’ contributions

AC: designed the review, acquired data, conducted analysis, interpreted data, drafted the manuscript, approved version to be published and is accountable for all aspects of the work. AM: conducted analysis, interpreted data, critically revised the manuscript for important intellectual content, approved version to be published and is accountable for all aspects of the work. PL: acquired data, conducted analysis, critically revised the manuscript for important intellectual content, approved version to be published and is accountable for all aspects of the work. RC: designed the review, conducted analysis, interpreted data, critically revised the manuscript for important intellectual content, approved version to be published and is accountable for all aspects of the work. All authors read and approved the final manuscript.

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Additional file 1:

MEDLINE search strategy.

Additional file 2:

AMSTAR score of potentially relevant systematic reviews.

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Conway, A., McCarthy, A.L., Lawrence, P. et al. The prevention, detection and management of cancer treatment-induced cardiotoxicity: a meta-review. BMC Cancer 15, 366 (2015). https://doi.org/10.1186/s12885-015-1407-6

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Keywords

BMC Cancer

ISSN: 1471-2407

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