Methods:Consecutive patients without persistent atrial fibrillation who received an AV-synchronous leadless pacemaker and completed follow-up between February 2020 and April 2021 were included. We evaluated tracking index (atrial mechanical sense followed by ventricular pace [AM-VP] divided by total VP)...
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 ...
A stimulator for applying stimulus pulses to the AV nodal fat pad in response to sensed atrial rate exceeding a predetermined rate, in order to reduce the ventricular rate. The device also includes a cardiac pacemaker which serves to pac... GH Bardy,R Mehra - US 被引量: 341发表: 1994年...
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 ...
In addition to symptoms of palpitations, patients with AF have an increased risk of stroke and may also develop decreased exercise tolerance and left ventricular dysfunction. All of these problems may be reversed with restoration and maintenance of sinus rhythm. External electrical cardioversion has ...
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 ...
Accordingly, the present invention provides for monitoring atrial depolarization, identifying sensed atrial acceleration as physiological or pathological, dissociating the atrium and the ventricle when a pathological (abnormal) acceleration of the atrium is detected by slowing-down the ventricular rhythm, and...
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,...
Atrial fibrillation is the most common persistent heart rhythm abnormality observed in medical practice. Instead of beating regularly, the heartbeats are completely irregular and erratic. The irregular heartbeats may speed up, and the heart rate may be as fast as 120–200 beats/min at rest. These...
The ventricular depolarization recorded on the atrial electrode is referred to as the far-field R wave (FFRW). Oversensing of the FFRW confounds interpretation of the atrial rhythm. The amplitude of the FFRW depends on the location of the atrial electrode. It is greatest near the septum, ...