RNRVAS = repetitive non-re-entrant ventriculoatrial synchrony; rP = retrograde P-wave; SACT = sinoatrial conduction time; SAN = sinus node; SIR = sensor indicated rhythm; V-EGM = ventricular electrogram; VA = ventriculoatrial; VP = ventricular pacing; VS = ventricular sensing; spark-symbol...
"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 ...
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 ...
and is activated when the sensed ventricular activity indicates a probability of atrial fibrillation to conserve a depletable power source. An endocardial lead is also described which ensures that the delivered atrial defibrillating electrical energy is substantially confined to the atria of the heart...
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...
In 2 patients the DDIR mode was programmed due to intermittent synchronization of ventricular stimuli to near incessant supraventricular tachycardia, which sometimes gave rise to asymptomatic slightly irregular ventricular paced rhythms below WO beats/min. Recognition of AF or AFL was reliable. No ...
Baseline PR interval was 204 ms ± 32 ms and programmed AV intervals (DDD/R) were 200 ms ± 50 ms (paced)/167 ms ± 54 ms (sensed). Cum%AP was similar between MVP and DDD/R (47.9 ± 37 vs 46.3 ± 36). Cumulative percent ventricular pacing was significantly lower in MVP vs DDD...
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 ...
An increase in signal during biventricular pacemaker optimisation is seen when moving from a sensed mode to a paced mode. This increase is much more pronounced than increases in signal seen when increasing heart rate Atrial pacing reduced noise (average SEM of systolic blood pressure measurements) ...
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 ...