Unusual VDD-pacing.
The case of an 80-year-old woman who underwent permanent VDD-pacemaker implantation for recurrent syncope in the presence of second-degree type 2 AV-block is reported. During follow-up, low atrial sensing with AV-synchrony of only 58-73% was noted. Four years after the pacemaker implantation, the patient was hospitalized for non-cardiac reasons and the chest radiograph showed displacement of the atrial dipole into the right ventricular outflow tract (RVOT). It is hypothesized that AV-synchrony was maintained by left atrial sensing due to the anatomic proximity of the RVOT to the left atrial appendage.
Schumann
Jörg
J
Cardiology Division, Internal Medicine University Department, Kantonsspital Bruderholz, H-4101 Bruderholz, Switzerland.
Kiencke
Stephanie
S
Osswald
Stefan
S
Rickenbacher
Peter
P
D000369:Aged, 80 and over; D004562:Electrocardiography; D004567:Electrodes, Implanted / Q000009:adverse effects; D004868:Equipment Failure; D005260:Female; D006325:Heart Atria / Q000503:physiopathology; D006327:Heart Block / Q000628:therapy; D006801:Humans; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D013575:Syncope / Q000209:etiology; D018754:Ventricular Dysfunction / Q000503:physiopathology*