<abstract xmlns="http://www.w3.org/1999/xhtml"><sec id="j_fco-2016-0007_s_333_w2aab3b8b8b1b7b1aab1c13b1Aa"><h3>Purpose</h3><p>Adjuvant trastuzumab is currently an internationally standard for the treatment of localised breast cancer that over express HER2 with the most adverse effect being cardiotoxicity. We conducted this study to evaluate the cardiac safety of trastuzumab in clinical practice.</p></sec><sec id="j_fco-2016-0007_s_334_w2aab3b8b8b1b7b1aab1c13b2Aa"><h3>Methods</h3><p>This study is a retrospective observational single institutional study conducted in the Oncology Center of King Abdulla Medical City (KAMC), Makkah, Saudi Arabia, from June 2011 to January 2014. We evaluated the incidence of cardio toxicity and associated risk factors during adjuvant trastuzumab treatment.</p></sec><sec id="j_fco-2016-0007_s_335_w2aab3b8b8b1b7b1aab1c13b3Aa"><h3>Results</h3><p>Of 57 patients, 20 patients (35%) exhibited cardiotoxicity. About 14% of patients had drop of left ventricular ejection fraction (LVEF) below 50%, whilst 10% and 15% drop of LVEF below their baseline levels were found in 30% and 5% of patients, respectively. About 98.3% of our patients have completed treatment, of whom 21% had a provisional interruption because of a fall in LVEF. A definitive trastuzumab discontinuation has been made in 1.75% of cases because of a nonregressive reduction in LVEF. Analysis of risk factors related to trastuzumab cardio toxicity found that patients older than 40 years were more likely to develop cardio toxicity compared to those younger than 40 years. This difference was statistically significant (p = 0.042).</p></sec><sec id="j_fco-2016-0007_s_336_w2aab3b8b8b1b7b1aab1c13b4Aa"><h3>Conclusion</h3><p>In our study, the cardiac safety seems comparable with the literature data. Trastuzumab-related cardiotoxicity is manifested by an asymptomatic decrease in the LVEF and less commonly by clinical heart failure. Most instances are transient, asymptomatic and reversible.</p></sec></abstract>

PurposeAdjuvant trastuzumab is currently an internationally standard for the treatment of localised breast cancer that over express HER2 with the most adverse effect being cardiotoxicity. We conducted this study to evaluate the cardiac safety of trastuzumab in clinical practice.MethodsThis study is a retrospective observational single institutional study conducted in the Oncology Center of King Abdulla Medical City (KAMC), Makkah, Saudi Arabia, from June 2011 to January 2014. We evaluated the incidence of cardio toxicity and associated risk factors during adjuvant trastuzumab treatment.ResultsOf 57 patients, 20 patients (35%) exhibited cardiotoxicity. About 14% of patients had drop of left ventricular ejection fraction (LVEF) below 50%, whilst 10% and 15% drop of LVEF below their baseline levels were found in 30% and 5% of patients, respectively. About 98.3% of our patients have completed treatment, of whom 21% had a provisional interruption because of a fall in LVEF. A definitive trastuzumab discontinuation has been made in 1.75% of cases because of a nonregressive reduction in LVEF. Analysis of risk factors related to trastuzumab cardio toxicity found that patients older than 40 years were more likely to develop cardio toxicity compared to those younger than 40 years. This difference was statistically significant (p = 0.042).ConclusionIn our study, the cardiac safety seems comparable with the literature data. Trastuzumab-related cardiotoxicity is manifested by an asymptomatic decrease in the LVEF and less commonly by clinical heart failure. Most instances are transient, asymptomatic and reversible.

Cardiotoxicity of the adjuvant trastuzumab in a Saudi population: clinical experience of a single institution

Clinical Oncology and Nuclear Medicine, Faculty of Medicine, Mansoura University, Egypt, Mansoura,

Cardiology, King Abdulla Medical City Makkah, Kingdom of

Medical Oncology, Oncology Center of King Abdulla Medical City (KAMC), Makkah, Kingdom of

Forum of Clinical Oncology

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

PurposeAdjuvant trastuzumab is currently an internationally standard for the treatment of localised breast cancer that over express HER2 with the most adverse...

Cardiotoxicity of the adjuvant trastuzumab in a Saudi population: clinical experience of a single institution

Published Online: Dec 30, 2016

Page range: 1 - 6

Received: Feb 23, 2016

Accepted: Oct 14, 2016

DOI: https://doi.org/10.1515/fco-2016-0007

Keywords
Cardiotoxicity, Adjuvant trastuzumabin, Breast cancer

© 2016 De Gruyter Open

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cardiotoxicity of the adjuvant trastuzumab in a Saudi population: clinical experience of a single institution

Published Online: Dec 30, 2016

Page range: 1 - 6

Received: Feb 23, 2016

Accepted: Oct 14, 2016

DOI: https://doi.org/10.1515/fco-2016-0007

KeywordsCardiotoxicity, Adjuvant trastuzumabin, Breast cancer

© 2016 De Gruyter Open

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords
Cardiotoxicity, Adjuvant trastuzumabin, Breast cancer