Common Calculations

What is the calculation for cardiac output?

HR x SV

What is the normal value for cardiac ourput?

4 to 8 L/min

What is the calculation for cardiac index?

CO/BSA (body surface area)

What is the normal volume for cardiac index?

2.5 - 4 L/min/m²

What is the average heart rate?

60 - 100 bpm

How do you calculate stroke volume?

EDV (end diastolic volume) - ESV (end systolic volume)

What is average stroke volume?

60 - 100 ml/beat

How do you calculate ejection fraction?

SV (stroke volume) / EDV

What is average ejection fraction?

40-60%

How do you calculate mean arterial pressure?

(SBP-DBP)/3 + DBP

What is average mean arterial pressure?

70-105 mmHg

How do you calculate system vascular resistance?

((MAP-RAP)/CO) * 80

What is average systemic vascular resistance?

800-1200 dyne sec/cm^5

How do you calculate pulmonary vascular resistance?

((MPAP-LAP)/CO)*80

What is average pulmonary vascular resistance?

<250 dyne sec/cm^5

How do you calculate left ventricular stroke work?

(SV)(MAP-PAWP)(0.0136)

What is average left ventricular stroke work?

58-104 gm-m/beat

How do you calculate coronary artery perfusion pressure?

Diastolic BP - PAWP

What is the average for coronary artery perfusion pressure?

60-80 mmHg

How do you calculate ventricular end-diastolic volume?

SV/EF

What is normal ventricular end-diastolic volume?

100-160 ml

How do you calculate ventricular end-systolic volume?

EDV-SV

What is average ventricular end-systolic volume?

50-100 ml

How do you calculate ventricular ejection fraction?

SV/EDV

What is average ventricular ejection fraction?

40-60%