Testosterone replacement study in men who had preexisting or a high risk of cardiovascular disease and who reported symptoms of hypogonadism (low testosterone) did not have any increased incidence of major adverse cardiac events compared to placebo.

Medical Mythbusting Commentary for July 4, 2023

Source:
Popular ‘low T’ treatment is safe for men with heart disease, but doctors warn it’s no youth serum

Reference:
Cardiovascular Safety of Testosterone-Replacement Therapy