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 ...
A cardiac rhythm management system selects an atrioventricular (A-V) delay based on a time-interval between an atrial depolarization and mitral valve closure (MVC). For several different A-V delays, the system measures time intervals between atrial depolarizations (i.e., sensed or paced P-...
Nonetheless, P waves (stars) that continue with unchanged cycle length after mode switch with a different ventriculoatrial interval demonstrate isorhythmic but independent sensed and paced events. A-EGM = atrial electrogram; AMS = automatic mode switch; AP = atrial pacing; AS = atrial sensing; ...
The rhythm is evaluated 1380 and if the current rhythm is 2:1 undersensed AFL, then the device checks to see if a rhythm change has occurred 1390. If a rhythm change is not detected 1390, then atrial tachyarrhythmia therapy is delivered 1360. If a rhythm change is detected 1390, then ...
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
Loss of atrioventricular (AV) synchrony by atrial premature beats and after an episode of AF or AFL is prevented by atrial synchronization pulses (ASP), which are delivered after a safe interval (timed out from the sensed premature atrial event) has expired and before delivery of the next ...
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...
(INT v>MINPER) WENC2 Z ELSE Z Paced V, N><0 (avd ends >31 ms) SUSP E eJ (avd ends =31 ms) SUSP E e R Sensed R, N=0 INT A > MINPER WENC2 Z INT A <=MINPER Sensed R, N<>0 SUSP E e K SUSP Delay susp <=0 DESC A LM TU b ...
The disclosure relates generally to cardiac medical devices and, in particular, to a cardiac medical device and method for detecting atrial arrhythmia episodes from sensed cardiac electrical signals.BACKGROUNDDuring normal sinus rhythm (NSR), the heart beat is regulated by electrical signals produced ...
paced (i.e., that chamber where a stimulation pulse is delivered), with a “V” indicating the ventricle, an “A” indicating the atrium, and a “D” indicating both the atrium and ventricle. The second letter of the code identifies the chamber wherein cardiac activity is sensed, using ...