T-wave sensing window 298 may be adjusted in response to heart rate changes, in response to changes between a ventricular paced rhythm and a sensed intrinsic ventricular rhythm, and as needed to provide reliable P-wave sensing and discrimination from T-waves. FIGS. 5A, 5B, and 5C are ...
Objectives We aimed to compare the hemodynamic effects of right-atrial-paced (DDD) and right-atrial-sensed (VDD) biventricular paced rhythm on cardiac resy... Alain,Bernheim,and,... - 《Journal of the American College of Cardiology》 被引量: 163发表: 2005年 ...
"shockable" if, among other things, its ventricular refractory period (VRP), which may be extended by ventricular "noise" occurring during the VRP, is less than a predetermined value, which may be different depending on whether the VRP is initiated by a paced or sensed ventricular ...
With very large amplitude or prolonged-duration sensed signals (or high levels of post-pace polarization) these quiet timer blanking periods have been seen to cover the entire sensing window. Furthermore, with a short sensed atrial cycle length (CL), the blanking timer may be set repetitively,...
The sensing stage, the atrial fibrillation detector, the defibrillation shock generator, and control unit are adapted to trigger an atrial defibrillation shock after detection of an atrial fibrillation and synchronous with a sensed or a paced ventricular event. The control unit is adapted to compare ...
B: Intrinsic rhythm after cessation of stimulation. C: Rhythm detection via device interrogation. Device interrogation revealed an atrial-based pacing (DDDR) with A-sensed V-paced rhythm in a 1:1 ratio. Furthermore, no atrial high rate episodes had been recorded. Cessation of stimulation led ...
An implantable atrial defibrillator provides a pulse of defibrillating electrical energy to the atria of the heart in synchronism with sensed R waves in response to non-coincident sensing of an R wave at first and second areas of the heart. The defibrill
Shortening of the Sensed AV Delay of a Dual Chamber Pacemaker During Normal Sinus Rhythm We studied the Medtronic Thera and Kappa 400 dual chamber pacemakers to determine the causes and mechanism of shortening of the sensed AV delay during norm... SS Barold,CP Lau,HF Tse,... - 《Journal ...
Patients with atrial tachyarrhythmias had longer paced (153±29 versus 145±28 ms; P=0.046) and sensed (128±46 versus 118±25 ms; P=0.06) P-wave durations and were more likely to have AF induced during electrophysiological testing (23.5% versus 13.6%; P=0.03). They had s...
She was admitted to hospital due to an episode of syncope with history of presyncopal states.Methods: We evaluated a patient with EDMD and history of syncope accompanied by junctional rhythm. Dual chamber permanent pacemaker was implanted, but the atrial could not be paced nor sensed. Further ...