Assessment of the optimal atrioventricular delay in patients with dual chamber pacemakers using impedance cardiography and Doppler echocardiography
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منابع مشابه
The Beneficial Effects of Individualizing Adequate Atrioventricular Delay in Dual Chamber Pacemakers
J Cardiol Curr Res 2016, 5(3): 00164 valve diastolic regurgitation. Therefore, the optimal AV delay is calculated as the long AV delay minus the difference of the time intervals of the QRS onset to mitral valve closure at short and long AV intervals [5]. The Optimal AV synchronization will not only maximize cardiac output by increasing ventricular preload and by lowering the mean atrial pressur...
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BACKGROUND Empiric programming of the atrio-ventricular (AV) delay is commonly performed during pacemaker implantation. Transmitral flow assessment by Doppler echocardiography can be used to find the optimal AV delay by Ritter's method, but this cannot easily be performed during pacemaker implantation. We sought to determine a non-invasive surrogate for this assessment. Since electrocardiograph...
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BACKGROUND The optimal atrioventricular (AV) delay setting is important for achieving optimal AV synchrony in patients with an implanted DDD pacemaker. Using pulsed Doppler echocardiography is the most common method of predicting the optimal AV delay, but it is a complicated and time-consuming method. Therefore, an automatic optimizing function of the AV delay at different atrial rates is desir...
متن کاملProgramming an optimal atrioventricular interval in a dual chamber pacemaker regional population.
BACKGROUND Since the introduction of the dual chamber pacemaker (DDDR) in the early 1980s, researchers have repeatedly discussed and attempted to optimize the atrioventricular (AV) interval, in order to increase the cardiac performance of pacemaker patients. Nominal AV delay in a DDDR is not, by hemodynamics, the best option for the majority of patients with AV conduction disorders. Our researc...
متن کاملEvaluation of cardiac function by pacing at different right ventricular sites in patients with third-degree atrioventricular block using Doppler ultrasound.
OBJECTIVE This study utilized Doppler ultrasonography cardiograms in patients with third-degree atrioventricular (III-AV) block to compare right ventricular apex (RVA) pacing and right ventricular outflow tract (RVOT) pacing with respect to their effects on synchronization of contraction between the two ventricles, as well as on timing of specific left-ventricular electrical and mechanical even...
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