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Download Interventricular and intraventricular dyssynchrony in patients with Q
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Tyumen Cardiology Center Interventricular and intraventricular dyssynchrony in patients with Q-wave acute myocardial infarction www.infarkta.net 625026 Tyumen, Melnikaite 111 Kuznetsov VA, Krinochkin D.V., Plusnin AV, Soldatova AM • Background • Results Interventricular and left intraventricular Color-coded tissue Doppler imaging Interventricular dyssynchrony was found in 23 patients dyssynchrony is frequently observed in patients with (25.3%). Intraventricular dyssynchrony was detected by congestive heart failure. However, few data exist aortic preejection flow analysis in 5 patient (4.6%), tissue concerning the actual presence or absence of Doppler imaging - in 38 patients (41.7%, p<0.001 compared dyssynchrony in acute myocardial infarction (AMI). to aortic preejection flow analysis), and strain imaging in 62 • Aim patients (68.1%, p<0.001 compared to aortic preejection flow analysis). To determine the prevalence of inter- and left intraventricular dyssynchrony in patients with AMI by different echocardiographic approaches. Ts = Q – time to peak systolic velocity Color-coded tissue Doppler imaging • Materials and methods 91 patients were examined at the first day of Q- wave AMI. Interventricular dyssynchrony was established when interventricular mechanical delay estimated by pulse wave Doppler of aortic and pulmonary flows was >40 ms. Left intraventricular dyssynchrony was recognized if aortic preejection Q – time to peak systolic strain period was >140 ms or tissue Doppler maximal time • Conclusion difference between Q wave and peak systolic The prevalence of myocardial dyssynchrony is quite high in patients with Q-wave AMI. Left velocity of 12 left ventricular segments >60 ms (Ts) intraventricular dyssynchrony was found more frequently compared to interventricular or maximal time difference between Q wave and . dyssynchrony. In addition color-coded tissue Doppler imaging and strain imaging is more peak systolic strain of 12 left ventricular segments sensitive for detection of left intraventricular dyssynchrony than measurement of aortic >130 ms. preejection period. The authors have nothing to disclose.
