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[The interrelationship of left ventricular dyskinesia and silent myocardial ischemia in patients with stable
Insights
Silent myocardial ischemia, common in stable angina patients, correlates with pain severity. Its duration may predict heart failure and guide treatment effectiveness.
Area of Science:
- Cardiology
- Clinical Medicine
- Diagnostic Imaging
Background:
- Stable angina pectoris (Functional Class III-IV) affects patient quality of life.
- Silent myocardial ischemia (SMI) is a critical indicator of cardiac health.
- Early detection and assessment of SMI are vital for patient management.
Observation:
- 24-hour Holter monitoring revealed SMI in 87.5% of patients.
- Increased pain amplitude and duration were observed during ischemic episodes.
- Exercise echocardiography and transesophageal cardiac pacing were employed for functional assessment.
Findings:
- A significant correlation exists between longer SMI episodes (>15 min) and segmental asynchronism.
- The index of local contractility disturbance was significantly higher in patients with prolonged SMI.
- A relationship was identified between SMI duration and the incidence of heart failure.
Implications:
- SMI duration can serve as a prognostic marker in stable angina.
- Assessing SMI duration may help evaluate the adequacy of therapeutic interventions.
- This metric offers a valuable tool for refining patient risk stratification and treatment strategies.
Abstract:
A total of 40 patients with Functional Class III-IV stable angina pectoris were examined. Silent myocardial ischemia was detected in 87.5% of patients by using 24-hour Holter monitoring. A statistically significantly greater amplitude and longer duration of pain episodes were observed. The patients underwent exercise echocardiography. Functional exercise was performed by frequent-increasing transesophageal cardiac pacing. The index of local myocardial contractility disturbances was assessed and calculated as the product sum of the number of diseases segments by the rating coefficient: hypokinesia, 1 score, akinesia, 2 scores, and dyskinesia, 3 scores. There was a statistically higher segmental asynchronism in patients having a silent myocardial ischemic episode of more than 15 min. The index of local contractility disturbance in this group of patients was 7.9 +/- 3.2 units. There was a relationship between the duration of silent myocardial ischemia and the presence of heart failure. It was concluded that the duration of silent myocardial ischemia might be used as an additional criteria for assessing the severity, prognosis and adequacy of therapy in patients with stable angina on effort.