Exam 3: Hemodynamics Review

Question 1

inotropic action

Answer 1

contractility (pos = increased; neg = decreased)

Question 2

chronotropic action

Answer 2

heart rate

Question 3

dromotropic action

Answer 3

conduction

Question 4

CO

Answer 4

HR x SV

Question 5

SV

Answer 5

Amount of blood ejected from the left ventricle with each heartbeat, approx. 70 ml per beat

Question 6

contractility

Answer 6

Force of propelled stroke volume or ventricular contraction

Question 7

preload

Answer 7

End-diastolic volume or end-diastolic pressure. Increased volume will stretch muscle and lead to harder contraction (initially). Direct relationship w/SV

Question 8

afterload

Answer 8

Arterial pressure that the left ventricle must overcome to eject blood

Question 9

PVR

Answer 9

Resistance to ejection of blood from the ventricle. LV must overcome to eject blood to organs and tissues

Question 10

determinants of resistance

Answer 10

blood viscosity, vessel length, vessel diameter

Question 11

determinants of BP

Answer 11

CO x PVR. Impact on one will impact BP

Question 12

hemodynamics flow chart

Answer 12

drawing

Question 13

BP regulators

Answer 13

Sympathetic baroreceptors, RAAS, NPs, renal regulation

Question 14

RAAS

Answer 14

insert drawing from notes