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Mean Arterial Pressure (MAP)
- Perfusion pressure. Reflects changes in relationship between cardiac output (CO) and systemic vascular resistance (SVR) and reflects the arterial pressure in the vessels perfusing the organs.
Central Venous Pressure (CVP)
- 2-8 mmHg
- Right sided preload. Fluid level. Measured in the SVC/ Right Atrium
Pulmonary Artery Systolic Pressure (PAS)
Pulmonary Artery Diastolic Pressure (PAD)
- 10-15 mmHg
- Left sided preload. Pulmonary vascular bed pressure.
- Left Heart filling (indirect)
Pulmonary Artery Wedge Pressure (PAWP)
- 6-12 mmHg
- Left sided preload (indirect)
- Measure in the PA w/ inflation of ballon
Cardiac Output (CO)
- 4-8 L/min
- LV function. The volume of blood pumped by the heart in one minute.
Cardiac Index (CI)
- 2.5-4 L/min/m^2
- LV function. The amount of blood pumped by the heart, per minute, per meter square of the body surface area.
Stroke Volume (SV)
- 60-130 mL
- LV function. The amount of blood pumped by the heart in one minute.
Stroke Volume Index (SVI)
33-47. mL/beat/m^2. LV function
Stroke Volume Variance (SVV)
- <13% (Vented without arrhythmia)
- Preload responsiveness. Variation in arterial pulsations caused by volume changed during positive pressure inspiration. It is measured over a single respiratory cycle and defined as the maximal stroke volume less the minimal stroke volume divided by the average of these two stroke volumes.
Systemic Vascular Resistance (SVR)
800-1200 dynes sec/cm. Left sided afterload. The measurement of resistance or impediment of the systemic vascular bed to blood flow.
Pulmonary Vascular Resistance (PVR)
100-250 dynes sec/cm. Right sided afterload. The measurement of resistance or the impediment of the pulmonary vascular bed to blood flow.
Venous oxygen saturation (SvO2)
65-85%. (Mixed venous O2 sat). Oxygen consumption. O2 saturation in the pulmonary artery.
Central Venous Oxygen Saturation (ScvO2)
>70% to 90%. Oxygen consumption. O2 saturation in the SVC.
Contractility is the force and velocity with which the ventricular ejection occurs. (The squeeze of the heart)
Preload is the amount of blood in a ventricle before it contracts. (Gas in the tank). Preload is also known as 'filling pressures.'
Afterload is how hard the heart has to push to get the blood out. Afterload is also thought of as the resistance to flow or how clamped the blood vessels are.
Compliance refers to the distensibility of the ventricular myocardium or its ability to stretch.
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