Contractility

Question 1

Stroke Volume is

Answer 1

the volume ejected by each heart beat; CO / HR

Question 2

Contractility is

Answer 2

the force with which the heart propels the stroke volume forward

Question 3

Contractility variables

Answer 3

Starling’s law the greater the stretch = the greater the contraction; catecholamines; Inotropes agents that change muscular contractions; stroke volume; electrical activity that initiate HR; myocardial wall movement (damaged by MI can’t move); physiologic demand (exercise)

Question 4

Positive Inotropes

Answer 4

catecholamine; Ca+; dopamine; digoxin; glucagon insulin

Question 5

Negative Inotropes

Answer 5

Beta blockers