The atrial pacing mode is preferably the AVT pacing mode, wherein the atria (A) are paced, the ventricles (V) are sensed, and the atrial pacing is triggered (T) by the ventricular sense signals. Alternatively, the ADD pacing mode can be employed if the underlying sinus atrial ...
Eighteen such patients were atrial-sensed, ventricular multisite paced in random order for 5 minutes. The best achieved measure of cardiac output (CO), pulmonary capillary wedge pressure (PCWP) and left ventricular (LV) + dP/dtmax at RV, LV, and biventricular pacing sites compared. Baseline ...
ATP = antitachycardia pacing; ICD = implantable cardioverter-defibrillator; RV = right ventricle; RVOT = right ventricular outflow tract; VF = ventricular fibrillation; VP = Ventricular Paced; VS = Ventricular Sensed; VT = ventricular tachycardia. Underlying etiology of cardiomyopathy was ischemic ...
Right Atrial Pacing Impairs Cardiac Function During Resynchronization Therapy: Acute Effects of DDD Pacing Compared to VDD Pacing - ScienceDirect Objectives We aimed to compare the hemodynamic effects of right-atrial-paced (DDD) and right-atrial-sensed (VDD) biventricular paced rhythm on cardiac resy...
Blanking period activated after Vs is equal to 100 m s and after Ap is equal to 30 m s. Ap: Atrial Pacing; Vs: Ventricular Sensing. 2. Discussion Several clinical studies [[1], [2], [3], [4], [5], [6]] have shown in the past that unnecessary ventricular pacing can be ...
Overall, nearly 60% of all ventricular beats were paced in the DDDR-70 group compared with 1% in the VVI-40 group. Furthermore, the outcome appeared to worsen as the percentage of paced beats increased. It is possible that the outcome would have been different if the atrioventricular ...
METHODS: Fifty nine NYHA class III patients with left ventricular systolic dysfunction, chronic atrial fibrillation, slow ventricular rate necessitating permanent ventricular pacing, and a wide QRS complex (paced width >or=200 ms), were implanted with transvenous biventricular-VVIR pacemakers. This ...
and an ECG acquired within 30 days of the CMR examination. Exclusion criteria were ECG confounders such as atrial fibrillation or flutter, abundant premature ventricular contractions (bigeminy/trigeminy), paced rhythm, hypertrophic cardiomyopathy, congenital heart disease, Takotsubo cardiomyopathy, amyloidosis...
[9, 10,16] Pulmonary artery systolic pressure (PASP) was calculated as 4 × [peak velocity of TR]2 + estimated right atrial pressure based on inferior vena cava diameter and collapsibility.[9, 10] QRS duration (QRSd) was measured in 12 contemporary ECG leads. Paced QRSd was measured ...
7,19 Patients with previous aortic valve surgery, congenital heart disease, infective endocarditis, heart transplantation, supra- or subvalvular AS, dynamic LV outflow tract obstruction, more than moderate aortic or mitral valve regurgitation, a paced rhythm at the time of echocardiography, and ...