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Specialty: Physiology
Source: Physiological Research

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Total 31 results found since Jan 2013.

Cardiovascular responses of exercises performed within the extreme exercise domain
Physiol Res. 2023 Jul 14;72(3):319-327.ABSTRACTStroke volume (SV), heart rate (HR) and arterio-venous O2 difference (a-vO2diff) responses to heavy and severe-intensity exercise have been well documented; however, there is a lack of information on the SV, HR and a v-O2diff responses of work rates within extreme exercise domain. The aim of this study was, therefore, to focus on central and peripheral components of VO2 responses to exercises performed within the heavy, severe and extreme exercise domain. Eight well-trained male cyclists participated in this study. Maximal O2 consumption (VO2max) and corresponding work rate (P...
Source: Physiological Research - July 14, 2023 Category: Physiology Authors: A Gures M Colakoglu O Ozkaya H As G A Balci Source Type: research

Evaluation of blood-brain barrier integrity by the analysis of dynamic contrast-enhanced MRI - a comparison of quantitative and semi-quantitative methods
Physiol Res. 2022 Dec 31;71(S2):S259-S275.ABSTRACTDisruption of the blood-brain barrier (BBB) is a key feature of various brain disorders. To assess its integrity a parametrization of dynamic magnetic resonance imaging (DCE MRI) with a contrast agent (CA) is broadly used. Parametrization can be done quantitatively or semi-quantitatively. Quantitative methods directly describe BBB permeability but exhibit several drawbacks such as high computation demands, reproducibility issues, or low robustness. Semi-quantitative methods are fast to compute, simply mathematically described, and robust, however, they do not describe the s...
Source: Physiological Research - January 17, 2023 Category: Physiology Authors: D Kala V Šulc A Ol šerová J Svoboda Y Prysiazhniuk A Po šusta M Kyn čl J Šanda A Tomek J Ot áhal Source Type: research

Cardiovascular changes during phototherapy in newborns
Physiol Res. 2022 Dec 31;71(S2):S179-S186.ABSTRACTPhototherapy is the most effective non-invasive method of neonatal hyperbilirubinemia treatment. Application of this method can be associated with side effects including changes in the cardiovascular system. During phototherapy, the primary effects in the cardiovascular system include cutaneous vasodilation leading to skin hyperperfusion and subsequent redistribution of blood. The increased blood flow through the skin is associated with increased transepidermal water loss. Further effects include an increase in cerebral blood flow. Redistribution of blood to the cutaneous b...
Source: Physiological Research - January 17, 2023 Category: Physiology Authors: K Javorka L Nandr ážiová Z Uhr íková B Czippelov á K Ma ťašová M Javorka M Zibolen Source Type: research

Roles of isometric contraction training in promoting neuroprotection and angiogenesis after stroke in adult rats
Physiol Res. 2022 May 26. Online ahead of print.ABSTRACT100 rats were randomly divided into a sham-operated group and middle cerebral artery occlusion (MCAO) modeling groups. The sham group after surgery was observed for 14 days. After MCAO, some rats received isometric contraction training (ICT) which was as follows: an atraumatic tourniquet was placed around left or right hind limb to achieve hind limb ischemia for 5 min, followed by 5 min of reperfusion, 4 cycles for one time, once a day, and five days per week. The MCAO modeling groups included the following four groups: i) a group only received MCAO, and was observed ...
Source: Physiological Research - May 26, 2022 Category: Physiology Authors: C Mei T Ma Source Type: research

Acute and chronic cold exposure differentially affect cardiac control, but not cardiorespiratory function, in resting Atlantic salmon (S < em > almo salar < /em > )
Curr Res Physiol. 2022 Mar 17;5:158-170. doi: 10.1016/j.crphys.2022.03.002. eCollection 2022.ABSTRACTNo studies have examined the effects of cold temperatures (∼0-1 °C) on in vivo cardiac function and control, and metabolism, in salmonids. Thus, we examined: 1) how acclimation to 8 °C vs. acclimation (>3 weeks) or acute exposure (8-1 °C at 1 °C h-1) to 1 °C influenced cardiorespiratory parameters in resting Atlantic salmon; and 2) if/how the control of cardiac function was affected. Oxygen consumption ( M ˙ O 2 ) and cardiac function [i.e., heart rate (f H) and cardiac output ( Q ˙ ) ] were 50% lower in the acu...
Source: Physiological Research - April 1, 2022 Category: Physiology Authors: E S Porter K A Clow R M Sandrelli A K Gamperl Source Type: research

The effect of obesity, hypertension, diabetes mellitus, alcohol, and sleep apnea on the risk of atrial fibrillation
Physiol Res. 2021 Dec 30;70(Suppl4):S511-S525.ABSTRACTAtrial fibrillation (AF) is the most common sustained cardiac arrhythmia associated with a two-fold increase in mortality caused by a higher risk of stroke and heart failure. Currently, AF is present in ~ 2 % of the general population, and its incidence and prevalence are increasing. Obesity, hypertension, diabetes mellitus, obstructive sleep apnea, and alcohol consumption increase the risk of AF. Each unit of increase in BMI increases the risk of AF by 3 %, and intensive weight loss is also associated with reduced AF recurrence. Hypertension increases the risk of AF by...
Source: Physiological Research - February 24, 2022 Category: Physiology Authors: Z Čarná P Osman čík Source Type: research

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