TY - JOUR
T1 - Exercise performance with single chamber rate-responsive pacing in congenital heart defects after operation
AU - Paridon, Stephen M.
AU - Karpawich, Peter P.
AU - Pinsky, William W.
N1 - Funding Information:
From the Dipartimento di Patologia Umana ed Ereditaria, Sezione di Anatomia Patologica, Divisione di Cardiologia, Via Forlanini, 14, 27100 Pavia, Italy, the Dipartimento di Medicina Interna e Terapia Medica (Sez. Cl Med II), Istituto di Ricovero e Cura a Carattere Scientitico (IRCCS) Policlinico S. Matteo, Pavia, Italy, and the Dipar-timento di Scienze Biomcdiche e Tecnologiche, Universitl di Milano, Milano, Italy. This study was supported by grant “Cardiomiopatie e Miocardite”-ricerche finalizzate 1989-1990, from the Minister0 della Sanitl IRCCS Policlinico S. Matteo, Pavia, Italy. Manuscript received April 1, 1991; revised manuscript received and accepted July 8, 1991.
PY - 1991/11/1
Y1 - 1991/11/1
N2 - The use of various types of rate-responsive pacing systems (AAI-R, VVI-R) in anatomically normal hearts has resulted in improved exercise performance. This has been measured as improved work rate, maximal oxygen consumption, and oxygen consumption at which ventilatory anaerobic threshold is achieved. The usefulness of rate-responsive pacing in patients with congenital heart defects has not been extensively studied.1-3 Most patients with congenital heart defects are postoperative patients with either surgical atrioventricular block or sinus node dysfunction.4,5 The underlying structural cardiac defects are often complex and may contribute to impaired ventricular function. How these abnormalities affect physiologic cardiopulmonary response with single chamber rate-responsive pacing is unknown. We compared the exercise responses of patients with congenital heart defects using an implanted motion-sensing rate-responsive single chamber pacing system. This study was performed to evaluate potential efficacy of variable over fixed rate single chamber pacing in these patients.
AB - The use of various types of rate-responsive pacing systems (AAI-R, VVI-R) in anatomically normal hearts has resulted in improved exercise performance. This has been measured as improved work rate, maximal oxygen consumption, and oxygen consumption at which ventilatory anaerobic threshold is achieved. The usefulness of rate-responsive pacing in patients with congenital heart defects has not been extensively studied.1-3 Most patients with congenital heart defects are postoperative patients with either surgical atrioventricular block or sinus node dysfunction.4,5 The underlying structural cardiac defects are often complex and may contribute to impaired ventricular function. How these abnormalities affect physiologic cardiopulmonary response with single chamber rate-responsive pacing is unknown. We compared the exercise responses of patients with congenital heart defects using an implanted motion-sensing rate-responsive single chamber pacing system. This study was performed to evaluate potential efficacy of variable over fixed rate single chamber pacing in these patients.
UR - http://www.scopus.com/inward/record.url?scp=0025999527&partnerID=8YFLogxK
U2 - 10.1016/0002-9149(91)90201-U
DO - 10.1016/0002-9149(91)90201-U
M3 - Article
C2 - 1951087
AN - SCOPUS:0025999527
VL - 68
SP - 1231
EP - 1233
JO - The American Journal of Cardiology
JF - The American Journal of Cardiology
SN - 0002-9149
IS - 11
ER -