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systemic vascular resistance

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systemic vascular resistance
n.
An index of arteriolar constriction throughout the body, calculated by dividing the blood pressure by the cardiac output.

systemic vascular resistance (SVR),
the resistance the left ventricle must overcome to pump blood through the systemic circulation. As peripheral blood vessels constrict, the SVR increases.


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In the pre-cardiopulmonary bypass (CPB) period, the ITB-GA group had significantly lower mean arterial pressures and systemic vascular resistance (SVR) indexes.
Moreover, in an animal model, manual hyperinflation can lead to haemodynamic changes including reduced mean arterial pressure and increased pulmonary artery pressure during application of the technique, followed by reduced cardiac output and increased systemic vascular resistance (Anning et al 2003).
Pulmonary vascular resistance (Rp) and systemic vascular resistance (Rs) were calculated using the following formulas: Rp = mean pulmonary artery pressure--mean left atrium pressure / Qp, Rs = mean aortic pressure--mean right atrium pressure / Qs.
 
 
 
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