Related Experiment Videos
Postextrasystolic potentiation echocardiography in predicting reversible myocardial dysfunction by surgical coronary
R Scognamiglio1, M Marin, M Miorelli
1Department of Clinical and Experimental Medicine, University of Padua, Padova, Italy.
Insights
Postextrasystolic potentiation (PESP) echocardiography identifies viable heart muscle before bypass surgery. This non-ischemic method accurately predicts regional contractility recovery, aiding treatment decisions for coronary artery disease patients.
Area of Science:
- Cardiology
- Medical Imaging
Background:
- Sustained inotropic stimulation can worsen myocardial function in hypoperfused areas.
- Postextrasystolic potentiation (PESP) offers an instantaneous inotropic stimulus without ischemic risk.
Purpose of the Study:
- To evaluate PESP-echocardiography for predicting regional contractility recovery after coronary revascularization.
- To assess PESP's utility in identifying viable myocardium in patients with coronary artery disease.
Main Methods:
- Prospective study of 79 patients with multivessel coronary artery disease undergoing bypass surgery.
- Preoperative assessment of contractile dysfunction reversibility using PESP with varying coupling intervals (500-300 msec) and 2D echocardiography.
Main Results:
- PESP echocardiography demonstrated high diagnostic performance.
- Sensitivity was 92%, specificity was 87%, and predictive accuracy was 90% for identifying viable myocardium.
Conclusions:
- PESP echocardiography is a valuable, cost-effective tool for identifying viable myocardium.
- This method aids in predicting regional contractility recovery post-myocardial revascularization.
Abstract:
Sustained inotropic stimulation, such as dobutamine infusion, has the potential to cause an additional contractile deterioration in viable but chronically hypoperfused and dysfunctioning myocardium, by inducing ischemia. Postextrasystolic potentiation (PESP) represents a potent inotropic stimulus without risk of provoking ischemia, as it is instantaneous. In this study, we assessed the role of PESP-echocardiographic examination in predicting the recovery of regional contractility after coronary revascularization. We examined 105 consecutive patients with multivessel coronary artery disease who were candidates for bypass surgery; 79 were included in this prospective study. Preoperative reversibility of contractile dysfunction in asynergic myocardial regions was determined by PESP, with a coupling interval of 500 msec decreasing to 300 msec, with a progressive decrease by 10 msec. The examination was accompanied by continuous 2-dimensional (2D) echocardiographic monitoring. The assessed sensitivity and specificity were 92% and 87%, respectively; the predictive accuracy was 90%. These results demonstrated that PESP echocardiography is a useful and cost-effective method for identifying viable myocardium in patients undergoing myocardial revascularization.