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[Stress tests and coronary angiography in chronic myocardial infarct]
Insights
Predicting multi-vessel coronary artery disease in myocardial infarction (MI) patients is crucial. Angina and exercise-induced ST depression significantly correlate with additional severe coronary lesions, aiding treatment decisions.
Area of Science:
- Cardiology
- Vascular Medicine
Context:
- Myocardial infarction (MI) management involves assessing the extent of coronary artery disease.
- The presence of lesions in non-infarct-related arteries impacts treatment strategies like bypass surgery and anticoagulation.
- Coronary angiography is the standard for visualizing coronary lesions.
Purpose:
- To determine if clinical symptoms and exercise test results can predict multi-vessel coronary artery disease in MI patients.
- To investigate the association between angina pectoris and ischemic ST-segment depression during exercise with severe lesions in a second or third coronary vessel.
Summary:
- In Inferior Myocardial Infarction (IMI) patients, combined angina and ST depression predicted severe 2nd/3rd vessel lesions in 61.7%, compared to 3.4% with neither symptom.
- In Anteroseptal Infarction (ASI) patients, combined symptoms predicted severe 2nd/3rd vessel lesions in 30.2%, versus 3.0% with neither.
- Exercise-induced ST depression and angina are valuable indicators of multi-vessel disease in MI.
Impact:
- Findings can help clinicians non-invasively predict the extent of coronary artery disease.
- Improved prediction may optimize patient selection for coronary bypass surgery and long-term management.
- This research aids in risk stratification and prognosis assessment for myocardial infarction patients.
Abstract:
In patients with myocardial infarction (MI) the presence or absence of lesions in vessels other than the one which perfuses the infarcted area, has implications regarding coronary bypass surgery, long term anticoagulant therapy, work capacity and prognosis. We investigated whether involvement of a 2nd or 3rd vessels as demonstrated by coronary angiography can be predicted on the basis of angina pectoris and/or ischemic ST-segment depression during exercise. Inferior myocardial infarction (IMI, n = 146) Severe lesions (greater than or equal to 75%) of a 2nd or 3rd vessel were found in 61.7% of patients with IMI, who developed angina pectoris and ischemic ST-segment depression, in 18.6% of patients with ST-segment depression only, in 9.1% of patients with angina pectoris only and in 3.4% with neither angina pectoris nor ST-segment depression. Anteroseptal infarction (ASI, n = 116) Severe lesions (greater than or equal to 75%) of a 2nd or 3rd vessel were found in 30.2% of patients with ASI, who developed Angina pectoris and ischemic ST-segment depression; in 26.6% of patients with ST-segment depression only, in 20.0% of patients with angina pectoris only and in 3.0% of the patients with neither angina pectoris nor ST-segment depression. The clinical implications of the results are discussed.