Energetic Interrelationship between Spontaneous Low-Frequency Fluctuations in Regional Cerebral Blood Volume, Arterial Blood Pressure, Heart Rate, and Respiratory Rhythm

2007 ◽  
Author(s):  
Takusige Katura ◽  
Akihiko Yagyu ◽  
Akiko Obata ◽  
Kyoko Yamazaki ◽  
Atsushi Maki ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Arterial Blood Pressure ◽  
Blood Volume ◽  
Cerebral Blood Volume ◽  
Respiratory Rhythm ◽  
Low Frequency ◽  
Regional Cerebral Blood ◽  
Arterial Blood ◽  
Regional Cerebral Blood Volume

scholarly journals The Effects of Arterial Blood Pressure on the Regional Cerebral Blood Volume by X-Ray Fluorescence

Stroke ◽  
1973 ◽  
Vol 4 (3) ◽  
pp. 390-399 ◽  
Author(s):  
ROBERT L. GRUBB ◽  
MICHAEL E. PHELPS ◽  
MARCUS E. RAICHLE ◽  
MICHEL M. TER-POGOSSIAN
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Blood Volume ◽  
Cerebral Blood Volume ◽  
Regional Cerebral Blood ◽  
X Ray ◽  
Arterial Blood ◽  
Regional Cerebral Blood Volume

Supine exercise restores arterial blood pressure and skin blood flow despite dehydration and hyperthermia

1999 ◽  
Vol 277 (2) ◽  
pp. H576-H583 ◽  
Author(s):  
José González-Alonso ◽  
Ricardo Mora-Rodríguez ◽  
Edward F. Coyle
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Cardiac Output ◽  
Arterial Blood Pressure ◽  
Blood Volume ◽  
Plasma Catecholamines ◽  
Central Blood Volume ◽  
Vascular Conductance ◽  
Arterial Blood ◽  
Cutaneous Vascular Conductance

We determined whether the deleterious effects of dehydration and hyperthermia on cardiovascular function during upright exercise were attenuated by elevating central blood volume with supine exercise. Seven trained men [maximal oxygen consumption (V˙o 2 max) 4.7 ± 0.4 l/min (mean ± SE)] cycled for 30 min in the heat (35°C) in the upright and in the supine positions (V˙o 2 2.93 ± 0.27 l/min) while maintaining euhydration by fluid ingestion or while being dehydrated by 5% of body weight after 2 h of upright exercise. When subjects were euhydrated, esophageal temperature (Tes) was 37.8–38.0°C in both body postures. Dehydration caused equal hyperthermia during both upright and supine exercise (Tes = 38.7–38.8°C). During upright exercise, dehydration lowered stroke volume (SV), cardiac output, mean arterial pressure (MAP), and cutaneous vascular conductance and increased heart rate and plasma catecholamines [30 ± 6 ml, 3.0 ± 0.7 l/min, 6 ± 2 mmHg, 22 ± 8%, 14 ± 2 beats/min, and 50–96%, respectively; all P < 0.05]. In contrast, during supine exercise, dehydration did not cause significant alterations in MAP, cutaneous vascular conductance, or plasma catecholamines. Furthermore, supine versus upright exercise attenuated the increases in heart rate (7 ± 2 vs. 9 ± 1%) and the reductions in SV (13 ± 4 vs. 21 ± 3%) and cardiac output (8 ± 3 vs. 14 ± 3%) (all P< 0.05). These results suggest that the decline in cutaneous vascular conductance and the increase in plasma norepinephrine concentration, independent of hyperthermia, are associated with a reduction in central blood volume and a lower arterial blood pressure.

scholarly journals 209 CYCLIC FLUCTUATIONS IN CEREBRAL BLOOD VOLUME (CBV) AND MEAN ARTERIAL BLOOD PRESSURE (MAP) IN PRETERM INFANTS

1994 ◽  
Vol 36 (1) ◽  
pp. 37A-37A
Author(s):  
Kurt Von Siebenthal ◽  
Matthias Keel ◽  
Martin Wolf ◽  
Vera Dietz ◽  
Hans U Bucher ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Arterial Blood Pressure ◽  
Preterm Infants ◽  
Blood Volume ◽  
Mean Arterial Blood Pressure ◽  
Cerebral Blood Volume ◽  
Arterial Blood

Compression Stocking Length Effects on Arterial Blood Pressure and Heart Rate Following Head-Up Tilt in Healthy Volunteers

2014 ◽  
Vol 63 (6) ◽  
pp. 435-438 ◽  
Author(s):  
Kunihiko Tanaka ◽  
Shiori Tokumiya ◽  
Yumiko Ishihara ◽  
Yumiko Kohira ◽  
Tetsuro Katafuchi
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Healthy Volunteers ◽  
Arterial Blood Pressure ◽  
Compression Stocking ◽  
Arterial Blood ◽  
Head Up Tilt ◽  
Length Effects
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