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.

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 ?
Day 1 Day 2 Day 3 Central Venous Pressure (CVP) 15 6 8 Cardiac output (CO) 3.5 5.2 5.3 Cardiac Index (CI) 1.9 2.8 2.8 Pulmonary Vascular Resistance (PVR) 228 175 136 Systemic Vascular Resistance (SVR) 1965 1169 87.5 Stroke Volume (SV) 33.3 65 54.1
When there is uncorrected truncus arteriosus, the primary goal of anesthesia shall be to maintain a balance between the pulmonary vascular resistance and the systemic vascular resistance, and consider regional anesthesia with peripheral nerve block as an alternative for managing these patients.
CCBs (amlodipine, felodipine, nicardipine) inhibit vascular smooth muscle calcium channels, and thus, reduce systemic vascular resistance (Inrig, 2010).
4.4 l/min/[m.sup.2], p < 0.001), systemic vascular resistance (1227 vs.
For example, increased MPO-dependent consumption of endothelial nitric oxide might contribute to increased systemic vascular resistance, and deposition of MPO in cardiac tissue could propagate matrix deposition and adverse ventricular remodeling.
The ccNexfin with Masimo Rainbow SET utilises a single sensor finger cuff (BMEYE) and finger sensor (Masimo Rainbow SET) to capture and continuously measure beat-to-beat blood pressure (sys/dia), mean arterial pressure (MAP), cardiac output (CO), stroke volume (SV), systemic vascular resistance (SVR), derivative of pressure (dP/dt), non-invasive hemoglobin (SpHb), oxygen saturation (SpO2), and perfusion index (PI).
Another physiologic cardiovascular change of importance during pregnancy is a decrease of approximately 25% in systemic vascular resistance. This change may manifest with a decrease in systemic arterial pressure around midpregnancy and by widening of the pulse pressure observed in pregnant women.
They have both inotropic and vasodilating actions on venous capacitance and arterial conductance vessels, and therefore they increase cardiac output and lower pulmonary vascular resistance, systemic vascular resistance, and pulmonary capillary wedge pressure.[7] As with dobutamine hydrochloride, their effectiveness is probably limited, unless administration occurs shortly after the CNS event.
CardioDyanmics says the BioZdTEL uses it's proprietary BioZ noninvasive impedance cardiography (ICG) technology to collect hemodynamic measurements, including cardiac input, stroke volume, systemic vascular resistance and fluid status.
The hypotensive phase begins after 3 to 5 days; during this phase shock and associated low cardiac output and increased systemic vascular resistance occur.

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