Vascular resistance
Effect of pH on trout blood vessels and gill vascular resistance
... that blood pH may be a tonic regulator, or modulator, of vascular resistance. This may be problematic in fish where environmental pH can directly impact upon blood pH. Finally, these studies question ...
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The Neurogenic Vasoconstrictor Effect of Digitalis on Coronary Vascular Resistance
... The coronary vasoconstrictor properties of digitals were evaluated in 61 anesthetized, openchest dogs after coronary sinus cannulation and under conditions of a constant heart rate (atrioventricular pacing) and ...
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Low systemic vascular resistance: differential diagnosis and outcome
... in a severe decrease in SVR. In more than 90% of patients with septic shock who are aggressively volume loaded, the CO is initially normal or elevated. Therefore, hypotension results from reduced vascular ...
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STUDIES ON DIGITALIS I DIRECT EFFECTS ON PERIPHERAL VASCULAR RESISTANCE
... These exten and Stopp 9 observed a decline in cardiac periments thus support the contention that the output and slight elevation of arterial pressure increase in vascular resistance resu[r] ...
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Longitudinal distribution of vascular resistance in the pulmonary arteries, capillaries, and veins
... vascular resistance respectively. Vascular resistance was 322 dynes ·sec·cm -5 /ml of vessel in the lobar pulmonary arteries, 112 dynes·sec·cm -5 /ml in the pulmonary capillaries, and 115 ...
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Interaction of cardiopulmonary and carotid baroreflex control of vascular resistance in humans
... cardiopulmonary vagal afferents modulate carotid baroreflex control of vascular resistance. On the other hand, previous studies in human subjects have not produced convincing evidence of a specific ...
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Echocardiographic assessment of pulmonary vascular resistance in pulmonary arterial hypertension
... Pulmonary vascular resistance; Qp: Cardiac output; RAP: Right atrial pressure; TRV: Peak tri- cuspid regurgitant velocity; TVI lvot: Left ventricular outflow tract time-velocity integral; TVI rvot: Right ...
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Physical and adrenergic factors affecting systemic vascular resistance in the rainbow trout: a comparison with branchial vascular resistance
... An estimate of the absolute range of vascular resistance R and flow Q over which the branchial and systemic vascular beds can vary due to alterations in adrenergic activity alone Gills..[r] ...
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Systemic vascular resistance in cirrhosis: a predictor of severity?
... Our study was beset by the disadvantages inherent to a retrospective study. Even though we included only patients with a primary admitting diagnosis of decompensated liver cirrhosis, multiple unrecognized confounding ...
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Normal Pulmonary Vascular Resistance and Left Ventricular Hypertrophy in Young Infants with Bronchopulmonary Dysplasia: An Echocardiographic and Pathologic Study
... Infants with Bronchopulmonary Dysplasia: An Echocardiographic and Pathologic Normal Pulmonary Vascular Resistance and Left Ventricular Hypertrophy in Young. Services[r] ...
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Vascular Resistance Responses of an Eel Tail Preparation: Alpha Constriction and Beta Dilation
... Adrenaline AD and noradrenaline NA both increased vascular resistance, while isoprenaline decreased resistance which suggests the presence of both alpha and beta adrenergic receptors see[r] ...
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Effects of Inspired Oxygen on Echocardiographic Assessment of Pulmonary Vascular Resistance and Myocardial Contractility in Bronchopulmonary Dysplasia
... Resistance and Myocardial Contractility in Bronchopulmonary Dysplasia Effects of Inspired Oxygen on Echocardiographic Assessment of Pulmonary Vascular. http://pediatrics.aappublications.[r] ...
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Impact of flavonoid-rich black tea and beetroot juice on postprandial peripheral vascular resistance and glucose homeostasis in obese, insulin-resistant men: a randomized controlled trial
... thigh resistance artery blood flow, we repeatedly inflated the BP cuffs to 50 mmHg for eight cardiac cycles, followed by deflation for nine cardiac cycles, across a timeframe of five ...
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Renal vascular resistance is increased in patients with kidney transplant
... RVR describes the resistance to blood flow offered by renal blood vessels. Although renal perfusion values be- tween the groups were the same RVR was higher in transplant patients than in healthy controls probably ...
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Possible mechanisms of control of vascular resistance in the lobster Homarus americanus
... peripheral resistance is the only way in which the distribution to and from this artery can be ...which resistance changes occur in the other arteries is similar to that in the abdominal ...
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THE CHANGES IN CEREBRAL VASCULAR RESISTANCE OF MAN IN EXPERIMENTAL ALKALOSIS AND ACIDOSIS
... He also showed that the increased CBF of respiratory acidosis produced by breathing 5 per cent or 7 per cent CO2 was associated with increased CO2 content and a lowered pH of arterial bl[r] ...
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Effect of Cleistanthin C on Vascular Resistance
... adenine nucleotides. Later purinergic receptors were discovered in the vascular smooth muscle and in the endothelium. Purinergic receptors are classified into P1 and P2. P1 is again classified into A1, A2 (A2A and ...
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Local control of coronary vascular resistance
... 1982). It acts as a neurotransmitter causing direct relaxation of the vascular smooth muscle (Larsson et al. , 1976; Duckies & Said, 1982; Unverferth et al., 1985; Brum et al., I986) through action at specific ...
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ANOXIA AND HUMAN PULMONARY VASCULAR RESISTANCE
... Variations up to 20% of control values were observed in both directions again without constant relation either to the changes in cardiac output or pulmonary arteriolar resistance or to m[r] ...
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Autonomic regulation of cutaneous vascular resistance in the bullfrog Rana catesbeiana
... There were four specific goals: 1 to determine whether nerves associated with the vagal ganglion, the first two cervical sympathetic ganglia, cranial nerves IX and X and spinal nerves 1 [r] ...
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