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a Department of Cardiovascular Surgery, National Cardiovascular Center, Osaka, Japan
b Department of Pediatrics, National Cardiovascular Center, Osaka, Japan
Accepted for publication November 12, 2008.
* Address correspondence to Dr Yagihara, Department of Cardiovascular Surgery, National Cardiovascular Center, 5-7-1 Fujishiro-dai, Suita, Osaka, 565-8565, Japan (Email: yagihara{at}hsp.ncvc.go.jp).
Presented at the Forty-fourth Annual Meeting of The Society of Thoracic Surgeons, Fort Lauderdale, FL, Jan 28–30, 2008.
Background: Although the Fontan procedure is now being applied to younger patients, the influence of patients' age at the time of surgery on long-term results remains unclear. We investigated whether age at Fontan completion affects subsequent hemodynamics and exercise capacity in patients with a dominant left ventricle followed up for more than 5 years.
Methods: Between January 1990 and December 2001, 68 patients with a dominant left ventricle underwent total cavopulmonary connection (TCPC) at our institute. The survivors routinely underwent postoperative exercise tests and catheterization at 1 year and then every 5 years after TCPC, and were divided into group A (<3 years; n = 32) and group B (
3 years; n = 33), according to age at time of the Fontan procedure and retrospectively reviewed. We also examined the correlation between age at Fontan and data from postoperative catheterization or exercise tests.
Results: None of the patients died during a follow-up period of 91.2 ± 46.7 months. The postoperative exercise capacity (peak oxygen consumption; % of normal [61.3 ± 11.5 versus 51.9 ± 9.1, p = 0.0001]), cardiac index () at 5 years (3.31 ± 0.62 versus 2.86 ± 0.69, p = 0.0133) and at 10 years after TCPC (3.24 ± 0.46 versus 2.61 ± 0.65, p = 0.0194), and ventricular ejection fraction (%) at 10 years after TCPC (62.1 ± 7.6 versus 53.0 ± 8.0, p = 0.0131) were significantly higher in group A. Age at Fontan completion inversely correlated with postoperative peak oxygen consumption (R = –0.374, p = 0.0006) and cardiac index at 5 years (R = –0.452, p = 0.0003) and 10 years after TCPC (R = –0.491, p = 0.0072).
Conclusions: Earlier TCPC is beneficial in the long term from the viewpoint of exercise capacity and hemodynamics among patients with a dominant left ventricle.
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