GNRH1 and cardiac arrhythmia: Men on GnRH antagonists showed increased risk of acute myocardial infarction (HR: 1.62; 95% CI: 1.11‐2.35; I2: 0%) and arrhythmia (HR: 1.55; 95% CI: 1.11‐2.15, I2: 17%) compared to GnRH agonists.