Pediatric cardiac remodeling after cardiac resynchronization therapy.
A 1.8-year-old male required a conventional DDD pacemaker for an atrioventricular block after congenital heart surgery. Five years later, heart failure due to left ventricular (LV) dyssynchrony progressed and we performed cardiac resynchronization therapy (CRT). Long-term echocardiographic follow-up showed that LV shortening fraction had improved within the first year after CRT, and LV end diastolic dimension had decreased after the first year. During LV remodeling (1-24 months after CRT), the QRS duration shortened without a change in the JT and T (peak-end) interval. The New York Heart Association class improved from III to I during the 2.3-year follow-up.
Takabayashi
Shin
S
Department of Thoracic and Cardiovascular Surgery, Mie University Graduate School of Medicine, Tsu, Mie Japan. shin1111@clin.medic.mie-u.ac.jp
Shimpo
Hideto
H
Mitani
Yoshihide
Y
Komada
Yoshihiro
Y
D002304:Cardiac Pacing, Artificial; D006348:Cardiac Surgical Procedures; D002675:Child, Preschool; D022062:Electrophysiologic Techniques, Cardiac; D006327:Heart Block / Q000601:surgery; D006333:Heart Failure / Q000209:etiology / Q000503:physiopathology* / Q000601:surgery*; D006345:Heart Septal Defects, Ventricular / Q000601:surgery; D006801:Humans; D008297:Male; D009200:Myocardial Contraction; D010138:Pacemaker, Artificial; D012086:Reoperation; D013318:Stroke Volume; D013771:Tetralogy of Fallot / Q000601:surgery; D013908:Thoracotomy; D018487:Ventricular Dysfunction, Left / Q000150:complications / Q000503:physiopathology* / Q000601:surgery*; D020257:Ventricular Remodeling