Reversible atrial lead dysfunction of DDD pacemaker after recent inferior myocardial infarction--a case report.
A patient with DDD pacemaker had pacing dysfunction following an inferior myocardial infarction. The threshold of that implanted right atrial pacing lead was abnormally high but the generator was normal. A temporary lead was inserted into the high right atrium near the appendage and near the low atrium for testing of threshold, which was abnormally high in these 2 places. Forty days after stent implantation in the proximal segment of the right coronary artery, the threshold spontaneously returned to normal. The change threshold of electrode-tissue interface in the right atrium was suspected due to hibernation of right atrium ischemia.
Chen
Chiliang
C
Cardiovascular Center, Tainan Municipal Hospital, Taiwan, ROC. chiliang@mail.tmh.org.tw
Fang
Ching-Chang
CC
Wang
Shih-Pu
SP
D000368:Aged; D003331:Coronary Vessels / Q000601:surgery; D004567:Electrodes, Implanted; D004868:Equipment Failure; D005260:Female; D006325:Heart Atria / Q000503:physiopathology*; D006801:Humans; D009203:Myocardial Infarction / Q000503:physiopathology* / Q000601:surgery*; D010138:Pacemaker, Artificial; D015607:Stents