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Survivors of prehospitalization sudden death. Characteristic clinical and angiographic features
Insights
Sudden cardiac death survivors often have severe coronary artery disease, but acute myocardial infarction is not always present. Underlying causes of sudden cardiac death can be multifactorial.
Area of Science:
- Cardiology
- Cardiovascular Medicine
- Clinical Research
Background:
- Sudden cardiac death (SCD) is a critical event with significant mortality.
- Understanding the underlying pathology in survivors is crucial for risk stratification and prevention.
- Prehospitalization sudden cardiac death (PSD) survivors represent a unique cohort for studying SCD mechanisms.
Purpose of the Study:
- To investigate the coronary artery disease burden and left ventricular function in survivors of PSD.
- To explore the relationship between coronary artery disease severity, myocardial infarction, and clinical presentation in PSD survivors.
- To identify potential underlying causes and contributing factors to PSD.
Main Methods:
- Cardiac catheterization and angiography were performed in 57 PSD survivors.
- Assessment included evaluation of coronary artery disease extent, myocardial infarction presence, and left ventricular function.
- Clinical history regarding cardiovascular symptoms prior to the event was reviewed.
Main Results:
- Fifty-two (91%) survivors had coronary artery disease, frequently severe and involving the anterior descending artery.
- Left ventricular dysfunction was common among survivors.
- Only 16 survivors had an acute myocardial infarction associated with the PSD event; their coronary artery disease was less severe than those who died suddenly without infarction.
Conclusions:
- Severe coronary artery disease is the predominant finding in PSD survivors, but not always associated with acute myocardial infarction.
- Clinical presentation varies, with some experiencing prolonged symptoms, crescendo angina, or Prinzmetal's angina, while others have sudden death as the initial cardiac symptom.
- PSD is often linked to severe coronary artery disease but may result from multiple underlying causes.
Abstract:
Cardiac catheterization and angiography were performed in 57 survivors of prehospitalization sudden cardiac death (PSD). Fifty-two had coronary artery disease. In most, the disease was severe, with almost universal involvement of the anterior descending artery. Associated left ventricular dysfunction was common. Although the majority of survivors had severe coronary artery disease, only 16 had an acute myocardial infarction associated with the PSD event and the extent of their coronary artery disease generally was less severe than those who died suddenly of an arrhythmia and no myocardial infarction. Cardiovascular symptoms of long duration prior to sudden death were not uncommon, although sudden death was the initial cardiac symptom in some. Others had crescendo angina as the initial symptom, and a few had a clinical history compatible with Prinzmetal's angina. Although severe coronary artery disease was the most common underlying abnormality, PSD may be an expression of multiple causes.