[Holter monitoring and silent myocardial ischemia]
1Clinique cardiologique de l'hôpital Necker, Paris.
Insights
Most myocardial ischaemia episodes in coronary disease patients are silent and undetected by angina. Holter monitoring effectively detects these asymptomatic events, aiding risk identification and treatment evaluation in cardiac patients.
Area of Science:
- Cardiology
- Ischaemic Heart Disease
- Diagnostic Monitoring
Context:
- Angina is an unreliable indicator of myocardial ischaemia.
- Up to 75% of ischaemic episodes in coronary disease patients are asymptomatic.
- Silent myocardial ischaemia poses a significant prognostic challenge.
Purpose:
- To highlight the limitations of angina as a sole indicator of myocardial ischaemia.
- To emphasize the diagnostic utility of Holter monitoring for detecting silent ischaemic episodes.
- To underscore the prognostic significance of silent ischaemia in various coronary syndromes.
Summary:
- Holter monitoring, especially with advanced digital electrocardiogram recorders, detects asymptomatic myocardial ischaemia.
- Silent ischaemic episodes share temporal patterns with symptomatic ones but are often shorter.
- The presence of silent ischaemia indicates a poor prognosis in stable angina, unstable angina, and post-infarction patients.
Impact:
- Holter monitoring is crucial for identifying at-risk individuals with known coronary disease.
- This method enables objective evaluation of anti-ischaemic treatment efficacy.
- Improved detection of silent ischaemia can lead to better patient stratification and management strategies.
Abstract:
Angina is not a very sensitive indicator of myocardial ischaemia. In patients with coronary disease 75 percent of ischaemic episodes are asymptomatic. Holter monitoring enables such silent episodes to be detected in daily life, this method becoming more sensitive when pursued for several days. The procedure is facilitated by a new generation of Holter recorders fitted with microprocessors that digitalize electrocardiograms. Silent episodes occur in the same circumstances as painful episodes, with a peak of incidence between 6 a.m. and noon, but they are often somewhat shorter. In patients with stable angina, as in those with unstable angina and after infarction, silent ischaemia is of poor prognosis. Holter monitoring therefore is useful in patients with known coronary disease to identify subjects at risk and to evaluate the effectiveness of anti-ischaemic treatments.
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