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. 2014;55(5):440-4.
doi: 10.1536/ihj.14-111. Epub 2014 Aug 11.

Recipients with shorter cardiopulmonary bypass time achieve improvement of parasympathetic reinnervation within 6 months after heart transplantation

Teruhiko Imamura  1 , Koichiro Kinugawa, Takeo Fujino, Toshiro Inaba, Hisataka Maki, Masaru Hatano, Osamu Kinoshita, Kan Nawata, Shunei Kyo, Minoru Ono
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Free article

Recipients with shorter cardiopulmonary bypass time achieve improvement of parasympathetic reinnervation within 6 months after heart transplantation

Teruhiko Imamura et al. Int Heart J. 2014.
Free article

Abstract

Although cross-sectional late-phase reinnervation in heart transplantation (HTx) recipients has been demonstrated by several earlier studies, early-phase successive analyses especially for parasympathetic reinnervation remain unknown. Successive heart rate variability (HRV) data calculated by the MemCalc power spectral density method were obtained from 16 non-rejection recipients 1-24 weeks after HTx. High frequency (HF) level representing parasympathetic magnitude increased significantly at 6 months after HTx (from 0.9 ± 0.7 to 4.1 ± 2.8 ms(2*)). Only intraoperative shorter cardiopulmonary bypass time (181 ± 59 minutes) correlated with a higher level of HF at post-HTx 6 months among all baseline variables (r = -0.530(*)). Higher level of HF was associated with recovery of tachycardia at post-HTx 6 months (r = -0.514(*)). In conclusion, parasympathetic reinnervation emerges along with recovery of tachycardia < 6 months after HTx, which is accelerated by shorter intraoperative cardiopulmonary bypass time ((*)P < 0.05 for all).

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