Plaque histology and myocardial disease in sudden coronary death: the Fingesture study

Area of Science:

• Cardiology
• Pathology
• Forensic Medicine

Background:

• Coronary artery disease (CAD) accounts for a significant portion of sudden cardiac deaths (SCDs).
• The precise role of acute plaque complications in CAD-related SCDs remains incompletely understood.
• Understanding plaque characteristics and co-existing myocardial conditions is crucial for elucidating SCD mechanisms.

Purpose of the Study:

• To investigate the histological features of coronary plaques in victims of sudden cardiac death due to CAD.
• To determine the prevalence of concomitant myocardial diseases in these cases.
• To explore the relationship between plaque histology and myocardial pathology in sudden coronary death.

Main Methods:

• Analysis of autopsy data from 600 sudden cardiac death victims with coronary artery disease in Northern Finland.
• Histological examination of culprit coronary lesions to classify plaque types (rupture/erosion, intraplaque hemorrhage, stable plaque).
• Assessment of myocardial hypertrophy and fibrosis, correlating findings with plaque histology and cause of death.

Main Results:

• Acute plaque complications (rupture, erosion, hemorrhage) were identified in less than half (48%) of the sudden cardiac death cases.
• A majority of victims exhibited stable plaque morphology (52%).
• High prevalence of myocardial hypertrophy (78%) and fibrosis (93%) was observed, independent of plaque histology.

Conclusions:

• Contrary to previous beliefs, acute plaque complications are not universally present in sudden cardiac deaths attributed to coronary artery disease.
• Concomitant myocardial disease is highly prevalent in CAD-related SCDs.
• The presence and type of myocardial disease were not associated with specific coronary plaque morphologies.