Pathology of fatal acute myocardial infarction in the Chinese

Area of Science:

• Cardiology
• Pathology
• Epidemiology

Background:

• Acute myocardial infarction (AMI) is a leading cause of death globally.
• Understanding the pathological characteristics of fatal AMI in diverse populations is crucial for public health.
• Previous studies have primarily focused on Western populations, necessitating data from other ethnic groups.

Purpose of the Study:

• To conduct post-mortem examinations on a cohort of Chinese patients who died from acute myocardial infarction.
• To identify pathological findings, including infarct characteristics, complications, and coronary atherosclerosis.
• To compare these findings with existing data from Western countries.

Main Methods:

• Post-mortem examinations were performed on 89 consecutive hospital deaths from AMI in Hong Kong.
• Pathological assessment included identification of acute infarcts, old infarct scars, mechanical complications, coronary atherosclerosis, and occlusive thrombi.
• Data were compared with published reports on fatal myocardial infarctions in Western populations.

Main Results:

• Acute infarcts were identified in 93.3% of cases; old infarct scars were present in 23.6%.
• Coronary atherosclerosis was prevalent (94.7%), with three-vessel disease in 42.7%. Critical lesions were most common in the left anterior descending artery (45.3%).
• Occlusive coronary thrombi were found in 18.7% of patients; 38.8% of sudden deaths had no clear mechanical cause, suggesting primary arrhythmias.

Conclusions:

• Fatal acute myocardial infarction in Hong Kong Chinese shares similarities with Western populations regarding atherosclerosis and infarct patterns.
• The high prevalence of coronary atherosclerosis and specific lesion locations underscore the importance of cardiovascular risk factor management.
• Further research comparing pathological findings across different ethnicities can refine understanding and prevention strategies for AMI.