systemic vascular resistance


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sys·tem·ic vas·cu·lar re·sis·tance

an index of arteriolar compliance or constriction throughout the body; proportional to the blood pressure divided 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.

sys·tem·ic vas·cu·lar re·sis·tance

(sis-tem'ik vas'kyū-lăr rĕ-zis'tăns)
An index of arteriolar compliance or constriction throughout the body; equal to the blood pressure divided by the cardiac output.

systemic vascular resistance

Abbreviation: SVR
The resistance to the flow of blood through the body's blood vessels. It increases as vessels constrict (as when a drug like norepinephrine is given) and decreases when vessels dilate (as in septic shock). Any change in the diameter, elasticity, or number of vessels recruited can influence the measured amount of resistance to the flow of blood through the body.
See also: resistance
References in periodicals archive ?
Baseline parameters (T1 of Table 2 and Table 3) of heart rate, systemic arterial pressure, pulmonary arterial pressure, PCWP, systemic vascular resistance index, PVRI, cardiac index, LVSWI, and RVSWI between the two groups were statistically insignificant.
The preservation of cardiac index may be attributed to the concurrent reduction in systemic vascular resistance.
MAP: mean arterial pressure, RAP: right atrial pressure, SVRI: systemic vascular resistance index, PRSW: preload recruitable stroke work, EDPVR: end diastolic pressure volume relationship, P: the RM-ANOVA statistic comparing differences between baseline variables.
Concurrently, systemic vascular resistance fell by 40% (from 2823 to 1698 dyn.
This is consistent with previous fi ndings that PiCCO requires recalibration after marked changes in the systemic vascular resistance (8).

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