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Utility of stress echocardiography for postinfarct prognosis
1Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands.
Insights
Stress echocardiography effectively identifies high-risk myocardial infarct patients with undetected ischemia. This technique aids in detecting multivessel disease and predicting poor outcomes, improving post-infarct patient stratification.
Area of Science:
- Cardiology
- Diagnostic Imaging
Background:
- Identifying high-risk patients after myocardial infarct (MI) is crucial for optimal management.
- Current methods often fail to detect residual myocardial ischemia in a significant percentage of post-MI patients before discharge.
Purpose of the Study:
- To evaluate the utility of stress echocardiography in identifying high-risk patients following myocardial infarct.
- To assess the predictive value of stress echocardiography findings for multivessel disease and unfavorable outcomes.
Main Methods:
- Utilized digital technology to improve image quality for stress echocardiograms.
- Assessed for remote asynergy during dynamic exercise stress echocardiography.
- Compared findings with treadmill electrocardiography and echocardiographic ejection fraction.
Main Results:
- Stress echocardiography demonstrated improved image yield and practicality for post-MI risk stratification.
- Remote asynergy detected post-exercise strongly correlated with multivessel disease and adverse follow-up.
- Treadmill electrocardiography and echocardiographic ejection fraction showed limited predictive value.
Conclusions:
- Stress echocardiography is a practical and effective tool for identifying high-risk post-MI patients with residual ischemia.
- The presence of remote asynergy is a key indicator of significant coronary artery disease and poor prognosis.
- The technique's advantages (no injections, no radiation, low cost) support its increased application in post-infarct care.
Abstract:
Although high-risk patients following myocardial infarct are usually identified in the acute stage by clinical assessment and determination of left ventricular function at rest, a significant percentage of infarct patients with increased risks, i.e., presence of residual myocardial ischemia, remain undetected at discharge. Since the yield of adequate images for interpretation stress echocardiograms has been significantly improved with digital technology, stress echocardiography has become a truly practical technique to identify these patients. Presence of remote asynergy, i.e., asynergy not directly adjacent to the infarcted area and supposed to be related to another vascular region, directly following cessation of dynamic exercise appears to be highly related to multivessel disease and an unfavorable follow-up period. Treadmill electrocardiographic findings, however, appeared to be of limited value in this respect. Furthermore, the echocardiographic ejection fraction was also a poor predictor. The versatility of the technique, lack of injections, or radiation hazard, and the relatively low cost will undoubtedly increase the application of stress echocardiography for postinfarct stratification.