The acute effects of alcohol on cerebral hemodynamic changes induced by the head-up tilt test in healthy subjects

2016 ◽  
Vol 368 ◽  
pp. 113-120 ◽  
Author(s):  
Sandor Viski ◽  
Miklos Orosz ◽  
Katalin Reka Czuriga-Kovacs ◽  
Maria Tunde Magyar ◽  
Laszlo Csiba ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Tilt Test ◽  
Acute Effects ◽  
Hemodynamic Changes ◽  
Cerebral Hemodynamic ◽  
Head Up Tilt ◽  
Head Up Tilt Test

Performance evaluation of a portable bioimpedance cardiac output monitor for measuring hemodynamic changes in athletes during a head-up tilt test

2020 ◽  
Vol 128 (5) ◽  
pp. 1146-1152
Author(s):  
Cara H. Y. Cheung ◽  
May L. Khaw ◽  
Victor C. W. Tam ◽  
Michael T. C. Ying ◽  
Shara W. Y. Lee
Keyword(s):  
Impedance Cardiography ◽  
Tilt Test ◽  
Physiological Changes ◽  
Hemodynamic Changes ◽  
Volume Measurements ◽  
Head Up Tilt ◽  
Gravitational Influence ◽  
Cardiac Output Monitor ◽  
Head Up Tilt Test ◽  
Physical Features

The use of impedance cardiography to monitor physiological changes in sports is rarely reported. Using head-up tilt test, we evaluated a portable noninvasive impedance cardiography device (PhysioFlow) by comparing it with a reference Doppler monitor (USCOM). Accuracy in tracking hemodynamic changes deteriorated with higher tilt, implying a gravitational influence on its performance. Stroke volume measurements were overestimated, but the changes were underestimated. Despite its convenient physical features, the suitability of PhysioFlow for sports use is questionable.

scholarly journals Mathematical modeling of the cardiovascular autonomic control in healthy subjects during a passive head-up tilt test

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yurii M. Ishbulatov ◽  
Anatoly S. Karavaev ◽  
Anton R. Kiselev ◽  
Margarita A. Simonyan ◽  
Mikhail D. Prokhorov ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cardiovascular System ◽  
Healthy Subjects ◽  
Low Frequency ◽  
Tilt Test ◽  
Peripheral Vascular ◽  
Control Loops ◽  
Head Up Tilt ◽  
Head Up Tilt Test

Abstract A mathematical model is proposed for the autonomic control of cardiovascular system, which takes into account two separated self-exciting sympathetic control loops of heart rate and peripheral vascular tone. The control loops are represented by self-exciting time-delay systems and their tone depends on activity of the aortic, carotid, and lower-body baroreceptors. The model is used to study the dynamics of the adaptive processes that manifest in a healthy cardiovascular system during the passive head-up tilt test. Computer simulation provides continuous observation of the dynamics of the indexes and variables that cannot be measured in the direct experiment, including the noradrenaline concentration in vessel wall and heart muscle, tone of the sympathetic and parasympathetic control, peripheral vascular resistance, and blood pressure. In the supine and upright positions, we estimated the spectral characteristics of the model variables, especially in the low-frequency band, and the original index of total percent of phase synchronization between the low-frequency oscillations in heart rate and blood pressure signals. The model demonstrates good quantitative agreement with the dynamics of the experimentally observed indexes of cardiovascular system that were averaged for 50 healthy subjects.

Evaluation of Autonomic Influences on QT Dispersion Using the Head-Up Tilt Test in Healthy Subjects

1999 ◽  
Vol 22 (8) ◽  
pp. 1158-1163 ◽  
Author(s):  
MIKIKO NAKAGAWA ◽  
NAOHIKO TAKAHASHI ◽  
TETSU IWAO ◽  
HIDETOSHI YONEMOCHI ◽  
TATS+-HIKO OOIE ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Qt Dispersion ◽  
Tilt Test ◽  
Head Up Tilt ◽  
Head Up Tilt Test

Cardiovascular and Cerebral Hemodynamics in Asymptomatic Healthy Subjects With/Without Abnormal Head-up Tilt Test Versus Recurrent Fainters

2018 ◽  
Vol 35 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Antonio González-Hermosillo ◽  
Manuel Sierra-Beltrán ◽  
Ulises López-Peña ◽  
Andrei Kostin ◽  
Guadalupe Hernández-Pacheco ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Cerebral Hemodynamics ◽  
Tilt Test ◽  
Abnormal Head ◽  
Head Up Tilt ◽  
Head Up Tilt Test

scholarly journals Cerebral hemodynamic monitoring of Parkinson’s disease patients with orthostatic intolerance during head-up tilt test

2020 ◽  
Vol 7 (02) ◽  
pp. 1 ◽  
Author(s):  
Jung Bin Kim ◽  
Zephaniah Phillips ◽  
Seung-ho Paik ◽  
Shin-young Kang ◽  
Nam-Joon Jeon ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Hemodynamic Monitoring ◽  
Orthostatic Intolerance ◽  
Tilt Test ◽  
Cerebral Hemodynamic ◽  
Head Up Tilt ◽  
Head Up Tilt Test

scholarly journals Hemodynamic changes of unexplained syncope patients in head-up tilt test

2015 ◽  
Vol 14 (1) ◽  
pp. 626-633 ◽  
Author(s):  
X. Li ◽  
L.L. Liu ◽  
Y.J. Wan ◽  
R. Peng
Keyword(s):  
Tilt Test ◽  
Hemodynamic Changes ◽  
Head Up Tilt ◽  
Unexplained Syncope ◽  
Head Up Tilt Test
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