Short- and long-term cause of death in patients treated with primary PCI for STEMI

Area of Science:

• Cardiology
• Interventional Cardiology
• Public Health

Background:

• Short-term mortality after primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI) is well-documented.
• Long-term survival and causes of death in STEMI patients treated with primary PCI remain less understood.

Purpose of the Study:

• To investigate the long-term association between time and cause of death in patients with STEMI undergoing primary PCI.
• To identify predictors of mortality in this patient cohort.

Main Methods:

• Utilized a centralized civil registration system, patient files, and public disease registries for accurate record linkage.
• Traced time and cause of death in 2,804 consecutive STEMI patients treated with primary PCI.
• Followed patients for a median of 4.7 years, accumulating 13,447 patient-years of data.

Main Results:

• Within 30 days, cardiogenic shock and anoxic brain injury were primary causes of death. Age, culprit vessel characteristics, heart failure, and diabetes predicted mortality.
• After 30 days, the annual cardiac mortality rate was consistently below 1.5%.
• Beyond 30 days, 65% of deaths were noncardiac, predominantly from malignancies and pulmonary diseases. Five-year all-cause mortality reached 23.3%.

Conclusions:

• Patients surviving the initial month post-primary PCI for STEMI demonstrate an excellent long-term prognosis.
• The annual risk of cardiac death significantly decreases to less than 1.5% after the first month.
• Noncardiac conditions become the leading cause of mortality in long-term survivors of STEMI treated with primary PCI.