ArticleActa physiologica (Oxford, England)2013
Human baroreflex rhythms persist during handgrip and muscle ischaemia.
Article in Acta physiologica (Oxford, England), 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Attenuated peripheral oxygen extraction and greater cardiac output in women with posttraumatic stress disorder during exercise.Journal of applied physiology (Bethesda, Md. : 1985) · 2024Article
- Acute effects of sublingual nitroglycerin on cardiovagal and sympathetic baroreflex sensitivity.American journal of physiology. Regulatory, integrative and comparative physiology · 2021Article
- Biphasic changes in spontaneous cardiovagal baroreflex sensitivity during passive hyperthermia.Scientific reports · 2019Article
- Validity and variability of xBRS: instantaneous cardiac baroreflex sensitivity.Physiological reports · 2017Article
- Time-frequency methods and voluntary ramped-frequency breathing: a powerful combination for exploration of human neurophysiological mechanisms.Journal of applied physiology (Bethesda, Md. : 1985) · 2013Article
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Authors and funding
14 authors.
Funding
Abstract
aimTo determine whether physiological, rhythmic fluctuations of vagal baroreflex gain persist during exercise, post-exercise ischaemia and recovery.
methodsWe studied responses of six supine healthy men and one woman to a stereotyped protocol comprising rest, handgrip exercise at 40% maximum capacity to exhaustion, post-exercise forearm ischaemia and recovery. We measured electrocardiographic R-R intervals, photoplethysmographic finger arterial pressures and peroneal nerve muscle sympathetic activity. We derived vagal baroreflex gains from a sliding (25-s window moved by 2-s steps) systolic pressure-R-R interval transfer function at 0.04-0.15 Hz.
resultsVagal baroreflex gain oscillated at low, nearly constant frequencies throughout the protocol (at approx. 0.06 Hz - a period of about 18 s); however, during exercise, most oscillations were at low-gain levels, and during ischaemia and recovery, most oscillations were at high-gain levels.
conclusionsVagal baroreflex rhythms are not abolished by exercise, and they are not overwhelmed after exercise during ischaemia and recovery.
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