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[The value of echocardiography in interpreting exercise ST elevation 3-4 weeks after myocardial infarction]
E Straburzyńska-Migaj1, K Poprawski, I Piszczek
1Kliniki Kardiologii Instytutu Kardiologii A.M. w Poznaniu.
Insights
Exercise electrocardiogram (ECG) ST-elevation after myocardial infarction indicates significant left ventricular asynergy. Echocardiography confirms this finding, highlighting the value of this imaging technique in assessing post-infarction cardiac function.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Clinical Medicine
Background:
- Acute myocardial infarction (MI) can lead to impaired left ventricular function.
- Exercise electrocardiography (ECG) is used to assess cardiac response to stress post-MI.
- Echocardiography provides detailed structural and functional information of the heart.
Purpose of the Study:
- To evaluate the diagnostic value of exercise ECG-ST elevation in identifying left ventricular asynergy after acute myocardial infarction.
- To correlate exercise ECG findings with echocardiographic assessment of cardiac function.
Main Methods:
- Sixty-one patients underwent exercise stress testing and echocardiography 3-4 weeks post-MI.
- Exercise ECGs were analyzed for ST-elevation.
- Echocardiography assessed left ventricular asynergy, including dyskinesis and asynergy index.
Main Results:
- Isolated ST-elevation on exercise ECG was observed in 19.7% of patients, more common in anterior MI.
- All patients with exercise ST-elevation showed left ventricular asynergy on echocardiography.
- Patients with exercise ST-elevation had a significantly higher asynergy index compared to those without.
Conclusions:
- Exercise ECG ST-elevation is a valuable marker for detecting severe left ventricular asynergy post-MI.
- Echocardiography plays a crucial role in interpreting exercise ECG findings in post-MI patients.
- This correlation aids in assessing the extent of cardiac damage and functional impairment after myocardial infarction.
Abstract:
To assess the value of echocardiography in interpretation of exercise ST-elevation 61 patients (age 29-70, mean 53 years old) underwent exercise stress test and echocardiography 3-4 weeks after an acute myocardial infarction. Isolated ST-elevation in exercise ecg was found in 12 patients (19.7%), significant more frequently in anterior than inferior infarction. All patients with ST-elevation had left ventricular asynergy recognized by echocardiography. When compared to the patients without exercise ST-elevation, we found that dyskinesis was significant more frequently in patients without exercise ST-elevation (respectively: 50% i 2.6%; p less than 0.001). Index of asynergy was significant higher in patients with exercise ST-elevation (respectively: 0.59 and 0.25; p less than 0.01). Thus, exercise ST-elevation after acute myocardial infarction is a good marker of severe left ventricular asynergy recognized by echocardiography.