T wave oversensing and low percentage of biventricular pacing in cardiac resynchronization therapy.
The success of cardiac resynchronization therapy (CRT) depends on a high percentage of ventricular pacing. We present the electrocardiography and electrograms of a patient who underwent an implantable cardioverter-defibrillator (ICD) with CRT implantation showing a low percentage of ventricular pacing as a result of T wave oversensing of paced QRS. The patient showed no clinical improvement. We suggest finding a good sensitivity of F waves in induced ventricular fibrillation during ICD implantation in order to overcome the harm of possible oversensing.
Lezcano
Antonio O Luque
AO
Hospital Donostia Arrythmia Unit, Intensive Care Department, Donostia, Spain. oskar.luke@gmail.com
Aracama
Jose Manuel Porres
JM
Ayestaran
Vicente Urbistondo
VU
Urra
Francisco Garcia
FG
D002304:Cardiac Pacing, Artificial; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000503:physiopathology / Q000628:therapy*; D017147:Defibrillators, Implantable; D004554:Electric Countershock / Q000295:instrumentation*; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D004868:Equipment Failure; D006329:Heart Conduction System / Q000503:physiopathology; D006333:Heart Failure / Q000209:etiology / Q000503:physiopathology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D012815:Signal Processing, Computer-Assisted; D017211:Treatment Failure