Related Experiment Videos
Ventricular arrhythmias in patients with rest angina: correlation with ST segment changes and extent of coronary
Insights
Sudden cardiac death is often caused by ventricular arrhythmias during myocardial ischemia. This study found that transient ST segment elevation and significant ST shifts during rest pain predict these dangerous arrhythmias in angina patients.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Sudden cardiac death (SCD) is frequently linked to ventricular arrhythmias during myocardial ischemia.
- Angina pectoris at rest indicates significant coronary artery disease and poses a risk for cardiac events.
Purpose of the Study:
- To identify clinical, electrocardiographic (ECG), and arteriographic predictors of serious ventricular arrhythmias during rest angina episodes.
- To understand the relationship between specific ischemic patterns and the occurrence of ventricular arrhythmias.
Main Methods:
- Retrospective review of 218 catheterized patients experiencing angina pectoris at rest.
- Analysis of clinical data, ECG findings (including ST segment changes), and coronary arteriography.
- Correlation of these features with the presence of major ventricular arrhythmias during rest pain.
Main Results:
- Ventricular arrhythmias during rest pain were significantly more frequent in patients with transient ST segment elevation in anterior leads.
- Marked transient ST segment shifts (greater than 5 mm) were also associated with a higher incidence of ventricular arrhythmias.
- No significant correlation was found between the extent of coronary artery disease and the occurrence of these arrhythmias.
Conclusions:
- Transient ST segment elevation and significant ST shifts during rest angina are key indicators of serious ventricular arrhythmias.
- These findings can help identify high-risk patients who may benefit from closer monitoring or intervention.
- The extent of coronary disease alone is not a reliable predictor of ventricular arrhythmias during rest ischemia.
Abstract:
Major ventricular arrhythmias occurring concurrently with myocardial ischemia are presumed to be the most frequent mechanism for sudden cardiac death. Two hundred eighteen catheterized patients with angina pectoris at rest were reviewed to identify clinical, ECG, and arteriographic features that might correlate with the presence of serious ventricular arrhythmias occurring during episodes of rest pain. Ventricular arrhythmias during episodes of rest pain were significantly more common in patients who manifested transient ST segment elevation in the anterior leads and in patients with marked transient ST segment shifts (greater than 5 mm). Ventricular arrhythmias during episodes of rest pain were not more common in patients with extensive coronary artery disease.