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[Effect of diltiazem on silent myocardial ischemia]
Insights
Silent myocardial ischemia episodes in coronary heart disease (CHD) patients were studied using ECG monitoring. Findings suggest silent ST-segment changes indicate severe myocardial processes, potentially responsive to agents affecting coronary blood flow.
Area of Science:
- Cardiology
- Ischemic Heart Disease
- Electrocardiography
Context:
- Coronary heart disease (CHD) patients often experience myocardial ischemia.
- Silent ischemic episodes, undetected by patients, pose significant risks.
- Long-term electrocardiogram (ECG) monitoring is crucial for identifying these silent events.
Purpose:
- To investigate the prevalence and characteristics of silent myocardial ischemic episodes in CHD patients.
- To compare silent ST-segment changes with manifest ischemic events.
- To assess the potential impact of an intervention on silent ischemia.
Summary:
- Thirty-four CHD patients with silent myocardial ischemia were monitored via long-term ECG.
- Silent ST-segment elevations and depressions occurred significantly more frequently than manifest events (2.7-fold and 4.9-fold, respectively).
- A reduction in the frequency, duration, and amplitude of silent ST-segment changes was observed post-intervention, suggesting an effect on coronary blood flow and vascular tone.
Impact:
- Silent ST-segment changes in CHD patients indicate severe myocardial abnormalities.
- The observed reduction suggests a potential therapeutic target for improving coronary blood flow in CHD.
- This research highlights the importance of detecting silent ischemia for risk stratification and management in coronary heart disease.
Abstract:
Thirty-four patients with coronary heart disease who had silent myocardiac ischemic episodes as evidenced by long-term ECG monitoring were examined. Silent ST-segment elevations and depressions were encountered 2.7- and 4.9-fold as compared to manifest ones. The fact that the CHD patients had silent ST-segment depressions and/or prolonged high-amplitude silent ST-segment elevations suggests a grave severity of abnormal myocardial processes. There was a reduction in the number, duration of silent ST-segment elevations and depression episodes and in the amplitude of silent ST-segment depressions. This may indirectly indicate that the agent affects predominantly coronary blood flow and coronary vascular tone.