Age-related loss of Y chromosome is associated with mortality after ST-segment elevation myocardial infarction

Background While loss of Y chromosome (LOY), a common somatic alteration with aging, has been associated with cardiovascular diseases, its specific impact on ST-segment elevation myocardial infarction (STEMI) remains underexplored.Methods This study enrolled 928 males undergoing primary percutaneous coronary intervention for STEMI to investigate the impact of LOY in blood cells on all-cause mortality. LOY was measured in males using droplet digital polymerase chain reaction technique. The primary outcome was all-cause mortality.Results During a median of 3.99-year follow-up, 93 males (10.0%) died. Of these, 39 (4.2%) died within 1 year, 56 (6.0%) within 2 years, and 67 (7.2%) within 3 years. Compared to males with LOY Conclusions LOY ( ≥ 18%) is associated with an increased 1-, 2-, and 3-year mortality in male STEMI patients and may serve as a potential biomarker for risk stratification.