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Coronary arteriographic findings in patients with previous acute myocardial infarction
Insights
Patients with prior acute myocardial infarction (AMI) often show significant coronary artery stenosis. Left ventricular dyssynergy is common in those with pathological Q waves post-AMI.
Area of Science:
- Cardiology
- Cardiovascular Medicine
- Interventional Cardiology
Background:
- Acute myocardial infarction (AMI) is a leading cause of cardiovascular mortality.
- Understanding the long-term coronary artery status and left ventricular function after AMI is crucial for patient management.
- Previous autopsy studies provide insights into disease prevalence in deceased patients, but data from living patients undergoing angiography is less common.
Purpose of the Study:
- To investigate the prevalence of significant coronary artery stenosis in patients with a history of acute myocardial infarction.
- To assess the correlation between pathological Q waves on electrocardiography and left ventricular dyssynergy in these patients.
- To compare angiographic findings in survivors of AMI with autopsy data from AMI fatalities.
Main Methods:
- Selective coronary arteriography was performed on 234 consecutive patients.
- A subset of 49 patients with a history of acute myocardial infarction (AMI) between three months and ten years prior was identified.
- Left ventriculography was conducted, and pathological Q waves were assessed.
Main Results:
- Eighty percent of patients with prior AMI demonstrated more than 75% stenosis in at least one major coronary artery.
- Two- and three-vessel coronary artery disease was present in 31% of patients, a lower prevalence than reported in autopsy studies of AMI deaths.
- All 22 patients with pathological Q waves exhibited left ventricular dyssynergy.
Conclusions:
- Significant coronary artery disease is highly prevalent in patients surviving acute myocardial infarction.
- The observed prevalence of multi-vessel disease in this angiographic series is lower than in autopsy series of AMI fatalities, suggesting potential differences in patient populations or disease progression.
- Left ventricular dyssynergy is a consistent finding in patients with pathological Q waves following acute myocardial infarction, indicating impaired regional myocardial function.
Abstract:
In a consecutive series of 234 patients admitted for selective coronary arteriography, 49 had had definite acute myocardial infarction (AMI) three months to ten years previously. More than 75% stenosis in at least one of the major coronary arteries was found in 80% of the patients. Two and three-vessel disease was demonstrated in 31% of the patients, which differs significantly from the 75-80% reported in autopsy studies in patients dying from AMI. At ventriculography all 22 patients with pathological Q waves had dyssynergy of the left ventricle.