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 ?
Although myocardial dysfunction may contribute to hypotension, refractory hypotension is usually due to the low systemic vascular resistance.
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.
We planned an anaesthetic technique which was likely to be haemodynamically stable and did not need to use any haemodynamically active drugs to deal with systemic vascular resistance (SVR), pulmonary vascular resistance (PVR) or contractility.
High blood pressure is caused by either high blood flow (cardiac output) or high resistance in the vessels (systemic vascular resistance), and hypertensive drugs reduce blood pressure by reducing cardiac output or systemic vascular resistance.
Ularitide also produced a dose-related increase in the cardiac index and a reduction in systemic vascular resistance.
In addition we calculated cardiac index as CO divided by weight, and systemic vascular resistance with the formula CO times 80 divided by mean arterial pressure.