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Afferent and Efferent Nerve Activity of Arterial Baroreceptor Reflex Under Nonpulsatile Systemic Circulation
Author(s) -
Shomura Yu,
Tanaka Keizo,
Takabayashi Shin,
Hioki Iwao,
Tenpaku Hironori,
Maze Yasumi,
Shimono Takatsugu,
Shimpo Hideto,
Yada Isao
Publication year - 1999
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1046/j.1525-1594.1999.06393.x
Subject(s) - baroreceptor , efferent , reflex , medicine , anesthesia , blood pressure , mean arterial pressure , cardiology , afferent , heart rate
We studied the changes in arterial baroreceptor reflex (ABR) afferent activity and efferent activity induced by nonpulsatile systemic circulation (NC) during total left heart bypass (TLHB) in rabbits. To evaluate the influence of the circuit priming fluid and exposure to NC, we directly measured aortic depressor nerve activity (ADNA) (n = 5) and renal sympathetic nerve activity (RSNA) (n = 5) before the start of partial left heart bypass (PLHB) (Before), after PHLB (After), and 5 min after the start of TLHB (During THLB) while maintaining the mean aortic pressure. The circuit priming fluid did not affect the ABR. ADNA exhibited periodic discharge at Before and After, but at During THLB, this periodic discharge transformed into a continuous discharge, and ADNA increased significantly. However, there were no significant differences in RSNA. Our results suggested that in the acute phase under NC, the ABR differed from that under natural circulation.