Objective:To compare left ventricular(LV) activation sequence and systolic synchrony and left ventricular systolic function associated with right ventricular outflow tract (RVOT) pacing and right ventricular apex (RVA) pacing by real-time three-dimensional echocardiography and CARTO system.Methods:In the acute tests of six anesthetized closed-chest beagle canines,the pacing leads were navigated and deplored at right ventricular outflow tract [...]
Objectiv:To compare the pacing parameters, contraction synchrony and cardiac performance between RVA and RVOT pacing and provide evidence for more reasonable pacing modeMethod:sixty patients (average age 66.40±16.09 years,male cases 29,female cases 31 ) with bradyarrhythmia were randomized into RVA group (n=30 ,average age 68.83±15.88 years,male cases 13,female cases 17 ) and RVOT group (n=30 ,average [...]
Objective: To assess the contraction synchrony of the left ventricle (LV) in dilated cardiomyopathy(DCM) patients with normal or wide QRS duration by velocity vector imaging (VVI).To evaluate the relation of LV contraction synchrony with QRS duration、LV function and LV remodeling in DCM patients.Materials and Methods:Sixty normal subjects who were matched with study group in age [...]
Objective: To acquire patients’parameters of left ventricular function and systolic synchronism including left ventricular end-diastolic volume(LVEDV),left ventricular end-systolic volume(LVESV),left ventricular ejection fraction(LVEF) and stroke volume(SV) by real-time three-dimensional echocardiography(RT-3DE),test the brain natriuretic peptide(BNP) concentration,compare these parameters pre-operative and post-operative,assess impacts of RVA pacing on cardiac structure and function.By progrmming of AV-delay,we investigate RT-3DE at V-pace [...]
Objective To compare the effects of right ventricular apex(RVA) pacing and right ventricular outflow tract(RVOT)pacing on synchronization interventricular and intraventricular and left ventrieular(LV)function in patients with complete atrioventricular block.Methods 38 patients with complete atrioventricular block, admitted to hospital from June 2007 to June 2008, were randomized received RVA or RVOT pacing. Out of 38 patients [...]
The maintenance of ventricular activation sequence (VAS) and ventricular systolic synchrony (VSS) under the physiological condition depends on the special cardiac conduction system(His-Purkinje fibre, H-P), by which cardiac electrical activation is sequentially sped and ventricular synchronous systolic and diastolic process is completed. Due to the technique limitation on the implantation of pacing leads, ventricular pacing [...]
The formation of ventricular aneurysm (VA) after acute myocardial infarction (AMI) is a pathophysiologic process of myocardial structure and ventricular geometry volume remodeling caused by contractive stretching effect between normal tension muscle and loss tension muscle involved in necrotic, injurious and ischemic myocardium around the myocardial infarction area. VA is a extreme manifestation of ventricular [...]
Part One:The Impact of Septal Right Ventricular Outflow TractPacing and Right Ventricular Apex Pacing on Left Ventricular Synchrony and Function in Patients with Normal Cardiac FunctionObjective:To compare the impact of septal right ventricular outflow tract (RVOT) pacing and right ventricular apex (RVA) pacing on left ventricular synchrony, cardiac function and remodeling in patients with normal [...]
Hello,My name is Jack,Ph.D. Supervisor, Welcome to My WebSite