Non-invasive assessment of the changes in static and oscillatory components of peripheral pressure/flow relationships produced by moderate exercise in humans
Articolo
Data di Pubblicazione:
1997
Citazione:
Non-invasive assessment of the changes in static and oscillatory components of peripheral pressure/flow relationships produced by moderate exercise in humans / D. Lucini, L. Dalla Vecchia, A. Porta, A. Malliani, M. Pagani. - In: JOURNAL OF HYPERTENSION. - ISSN 0263-6352. - 15:12 Pt2(1997 Dec), pp. 1755-1760.
Abstract:
OBJECTIVE: The generalized sympathetic activation induced by exercise is accompanied by an increase in heart rate, blood pressure and vascular resistance in non-exercising vascular beds. The aim of the present study was to test the feasibility of assessing, non-invasively, the static and oscillatory pressure/flow relationships of peripheral arteries and their continuous changes during dynamic exercise. DESIGN: We studied 44 healthy humans at rest, during moderate exercise (recumbent bicycle exercise) and recovery using a totally non-invasive approach. METHODS: Arterial pressure was measured using a plethysmographic device, and ipsilateral brachial artery flow and palmar skin microcirculation flow were assessed with continuous wave Doppler and laser Doppler, respectively. Continuous, long data segments (> 90 s) were acquired with a personal computer and used to determine the changes of pressure/flow relationships of peripheral arteries during dynamic exercise. A new simplified method utilizing a transfer function analysis extracted automatically unequivocal indexes of static and oscillatory properties of vascular system. RESULTS: Moderate exercise induced significant increases of the static (Zo) and oscillatory (Zc) components of peripheral pressure/flow relationships in both brachial artery and skin microcirculation beds. Both indexes returned to control values during early recovery. CONCLUSIONS: This simple, non-invasive approach was capable of assessing the changes of static and oscillatory vascular properties induced by dynamic exercise. This method could be applied for a better understanding of the vascular modifications that occur in other physiological or pathophysiological conditions also characterized by increases in sympathetic drive.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Exercise; Oscillatory vascular properties; Pressure/flow relationship; Static vascular properties; Sympathetic activity
Elenco autori:
D. Lucini, L. Dalla Vecchia, A. Porta, A. Malliani, M. Pagani
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