Cardiac Physiology

Question 1

amount of blood ejected from the left ventricle each minute (normal for adult is 4-8L/minute)

can be calculated by multiplying a patient’s HR by stroke volume

Answer 1

Cardiac output

Question 2

amount of blood ejected from the left ventricle w each contraction (normal is 50-100 ml/contraction)

Answer 2

Stroke volume

Question 3

number of times a heart beats per minute (normal is 60-100 beats/min)

Answer 3

Heart rate

Question 4

volume of blood entering the ventricles during diastole (creating the pressure for systolic contraction)

Answer 4

Preload

Question 5

pressure the heart must push against during systole

Answer 5

Afterload

Question 6

strength of contraction (represented by the EF)

Answer 6

Contractility

Question 7

represented by pressures in the pulmonary circulation (e.g., pulmonary artery wedge pressures)

Answer 7

Right ventricular afterload

Question 8

represented by the patient’s MAP

Answer 8

left ventricular afterload

Question 9

average pressure in the arterial system over the entire cardiac cycle

SBP by two times the DBP then dividing the resulting number by three

Answer 9

MAP