An implantable pacemaker operates in a DDD mode and reverts to a modified DDI mode in response to sensing atrial depolarization early in the pacing cycle. The modified DDI mode, when invoked, provides addtional atrial kick by generating an atrial stimulation pulse (A-pulse) (150) when there ...
Device response to sensing 4. Device programmability 5. Additional functions. A five-position North American Society of Pacing and Electrophysiology/British Pacing andElectrophysiologyGroup generic pacemaker code is used to describe pacemakers on the basis of the above features. VVI pacing has a ventricu...
Clinical Validation of New Pacing-Sensing Configurations for Atrial Automatic Capture Verification in Pacemakers pacemakeratrial autocaptureevoked responsepacing afterpotentialautomatic capture verificationAtrial Automatic Pacing Capture Verification. Introduction: This study ... C Butter,WM Hartung,GN Kay,... ...
wave signal without a QRS component passes to an output connection from gate 12 to electrodes 5, 6 and controls stimulation of the heart via electrodes 5, 6, and delay means 15 which introduces an A-V delay between sensing of the P-wave and stimulation of the heart via electrodes 5, 6...
sensing circuitry, then the ventricular pacing channel may pace at the pacemaker upper rate limit. Some pacemakers respond to the “noise” of EMI by pacing in an asynchronous (fixed-rate) mode. Some older pacemakers may respond to EMI by reprogramming. The pacemaker response to the electrical ...
The device alters cardiac rate by sensing body motion, changes in breathing, or slight changes in blood temperature, which improves the quality of life for active patients. It is also called a rate-adaptive pacemaker. See also: pacemaker...
The refractory periods are time intervals starting after pacing or sensing an event in the ventricular and atrial cavities. The aim is to protect the device from multiple detections of the same contraction or post-potential detection of the spike, as well as farfield sensing o...
to 48 hr limits movement that could dislodge the tip of the pacing electrode(s) from the endocardial wall, preventing sensing of intrinsic beats or needed pacing. The incision is assessed for bleeding, infection, and incisional discomfort, which is controlled with prescribed analgesia. The ...
Treatment, prevention, and termination of pacemaker-mediated tachycardia (PMT) typically involves altering the pacemaker programming to prevent sensing of the retrograde atrial electrogram. This is most easily done by prolonging the postventricular atrial refractory period (PVARP). During the PVARP, the...
sensing atrial heartbeats, deriving an indication of intrinsic atrial rate in response to the sensing of atrial heartbeats, determining a metabolic indicator rate, determining a maximum atrial tracking rate as a function of said metabolic indicator rate, comparing said intrinsic atrial rate indicat...