Cardiovascular responses to short‐term head‐down positioning in healthy young and older adults

Abstract

The findings have little consequence in health, but they suggest that head-down postural drainage may be of concern for chest physiotherapy recipients with reduced cardiac reserve or impaired barorefilex function.

Baroreceptor activity impacts upon controlled but not automatic distractor processing

“…In order to avoid any psychological side effects we therefore chose the smallest possible angles that have been proven to still evoke changes in baroreceptor activity (Iida et al, 1999). Further, small inclination angles minimize physiological effects other than cardiovascular volume shifts that are to be expected with more extreme inclination angles (e.g., Hayano et al, 1993;Katkov & Chestukhin, 1980;Naylor et al, 2005;Smith & Ebert, 1990).…”

“…brain, eye, heart, lung) pressure changes, that would be expected for more extreme inclination angles (cf. Katkov & Chestukhin, 1980;Naylor, Chow, McLean, Heard, & Avolio, 2005) and…”

Deaths in a head-down position: a case report and review of the literature

“…A better understanding of involved mechanisms may be obtained by analysing data from human experimentation in physiological study on body responses to head-down tilt (HDT). In Table 2, results from several human experimental studies with HDT of more than 30°are compiled [10][11][12][13][14][15][16][17][18][19][20][21][22]. According to these results, it seems that cardiac output is significantly increased after HDT, mainly by an increase in stroke volume.…”

Use of high-frequency chest wall oscillation in an exacerbation of chronic pyo-obstructive bronchitis in adult patients with cystic fibrosis

“…[4] продемонстрировали, что постуральный дренаж связан с опасностью развития гастроэзофагеального рефлюкса. Длительное положение головой вниз также может вызывать бронхоспазм, повы-шение внутричерепного давления и нарушение ритма сердца [5,6]. Кроме того, классические методы бронхи-ального дренажа занимают очень много времени у паци-ента и связаны с низкой (ниже 50%) степенью выполне-ния рекомендаций по лечению [7].…”