Rapid autonomic tone regulation of atrioventricular nodal conduction in man
作者： G.S. Butrous , T. Cochrane , A.J. Camm
DOI: 10.1016/0002-8703(87)90054-8
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摘要: The changes in P-P intervals and atrioventricular nodal (AVN) conduction during the Valsalva maneuver were studied 17 patients. In spite of a significant decrease sinus interval phase II (733 ± 143 to 520 86 msec, p < 0.005) prolongation IV (884 171 0.01), there was no change AH (control: 78 15: II: 76 IV: 72 14 N.S.). six patients consecutive recorded solid-state memory used trigger pacing high right atrium at rest. This showed increase (75 10 123 45 0.05). Valsalve constant rate atrial resulted (115 36 80 15 0.001). During (156 58 msec) but 11 (61%) variable degree Wenckebach periodicity appeared. Thus autonomic tone modulates AVN induced physiologic heart variation, resulting maintenance adequate 1:1 conduction.
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