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Cardiovascular morbidity associated with gonadotropin releasing hormone agonists and an antagonist.

Abstract：

BACKGROUND:Androgen deprivation therapy (ADT) is associated with increased cardiovascular morbidity. OBJECTIVE:To determine whether cardiovascular morbidity differs following initiation of gonadotropin-releasing hormone (GnRH) agonists compared with an antagonist. DESIGN, SETTING, AND PARTICIPANTS:Pooled data from six phase 3 prospective randomized trials that recruited 2328 men between 2005 and 2012 to compare the efficacy of GnRH agonists against an antagonist. Men recruited had pathologically confirmed prostate cancer, an Eastern Cooperative Oncology Group score <2, a minimum life expectancy of 12 mo, and were naïve to ADT. Men were excluded if they had a prolonged baseline QT/corrected QT interval, other risk factors for heart failure, hypokalemia or a family history of long QT syndrome, or had another cancer diagnosed within 5 yr. INTERVENTION:Men were randomized to receive a GnRH agonist or an antagonist for either 3-7 mo (n=642) or 12 mo (n=1686). Treatment groups were balanced for common baseline characteristics. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS:Event analysis was based on death from any cause or cardiac events. Data documenting adverse experiences were classified based on the Medical Dictionary for Regulatory Activities. The following conditions defined a cardiac event: arterial embolic or thrombotic events, hemorrhagic or ischemic cerebrovascular conditions, myocardial infarction, and other ischemic heart disease. Kaplan-Meier curves and log-rank tests were used to compare time to a cardiovascular event or death. RESULTS AND LIMITATIONS:Among men with preexisting cardiovascular disease, the risk of cardiac events within 1 yr of initiating therapy was significantly lower among men treated with a GnRH antagonist compared with GnRH agonists (hazard ratio: 0.44; 95% confidence interval, 0.26-0.74; p=0.002). Since our analysis is post hoc, our findings should only be interpreted as hypothesis generating. CONCLUSIONS:GnRH antagonists appear to halve the number of cardiac events experienced by men with preexisting cardiovascular disease during the first year of ADT when compared to GnRH agonists.

journal_name

Eur Urol

journal_title

European urology

authors

Albertsen PC,Klotz L,Tombal B,Grady J,Olesen TK,Nilsson J

doi

10.1016/j.eururo.2013.10.032

subject

Has Abstract

pub_date

2014-03-01 00:00:00

pages

565-73

issue

eissn

0302-2838

issn

1873-7560

pii

S0302-2838(13)01108-1

journal_volume

pub_type

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Cardiovascular morbidity associated with gonadotropin releasing hormone agonists and an antagonist.