Hemodynamic Measurement Terminology

There are a number of hemodynamic terms that you will need to understand in order to properly interpret the hemodynamic measurements. The following table presents common values of hemodynamic parameters.

Normal value
Blood Pressure

Systolic (SBP)

90-140 mmHg

Diastolic (DBP)


Mean Arterial Pressure (MAP)

70 - 100 mm Hg
Cardiac Index (CI)
2.5-4 L/min/m2
Cardiac Output (CO)
4-8 L/min

Central Venous Pressure (CVP) (also known as Right Atrial Pressure (RA))

2-6 mmHg
Pulmonary Artery Pressure (PA)
Systolic 20-30 mmHg (PAS)
Diastolic 8-12 mmHg (PAD)
Mean 25 mmHg (PAM)
Pulmonary Capillary Wedge Pressure (PWCP)
4-12 mmHg
Pulmonary Vascular Resistance (PVR)
37-250 dynes/sec/cm5
Right Ventricular Pressure (RV)
Systolic-20-30 mmHg
Diastolic 0-5 mmHg
Stroke Index (SI)
25 - 45 ml/m2
Stroke Volume (SV)
50 - 100 ml
Systemic Vascular Resistance (SVR)
800-1200 dynes/sec/cm5

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Afterload is increased if the circulating blood is concentrated and/or if systemic blood vessels are constricted.

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After a significant hemorrhage, preload will be increased.