CFH CVICU study guide Questions with Correct Answers 100% Verified| Guaranteed Success
Inotropes Increase or decrease the force of myocardial contraction.
Chronotropes Increase or decrease heart rate.
Dromotropes Increase or decrease conduction velocity.
Vasopressors Increase or decrease vascular smooth muscle tone.
Positive inotropes catecholamines, calcium, Milrinone (primacore), and digoxin
Negative inotropes beta-blockers, calcium channel blockers
positive chronotropes atropine, dopamine, dobutamine, epinephrine.
negative chronotropes beta-blockers, digoxin, cardizem
positive dromotropes atropine, sympathomimetics
negative dromotropes digoxin, verapamil, diltiazem
sympathomimetic agents (catecholamines) Stimulate B-1, B-2, and alpha receptors.
B-1 receptors inotropic, chronotropic, and dromotropic effects.
B-2 receptors smooth muscle relaxation which can result in vasodilation and a decrease
in systemic vascular resistance (SVR).
, Alpha receptors vasoconstriction, increase in SVR, increase in blood pressure; can cause
decrease in CI due to the increase in after load.
Sympathomimetic drugs dobutamine, dopamine, epinephrine, norepinephrine (Levo),
phenylephrine (Neo).
Dobutamine B-1 and B-2 effects
dopamine B-1 at 1-2 mcg/kg/min
alpha at 10 mag/kg/min
epinephrine B-1 + B-2 at .01-.03mcg/kg/min
alpha > .03 mag/kg/min
epi notable effects blood sugar can increase. K will go into cells --> drop in K levels. When
blood sugar fixes --> K can shoot up.
Norepinephrine some B-1; mostly alpha effects
Phenylephrine pure alpha
phosphodiesterase inhibitors (milrinone) -do not affect adrenergic receptors
-increase myocardial contraction (increase CI) and venous/arterial dilation (decrease preload
and SVR).
beta blockers negative inotropes, decrease contractility, decrease HR, and recuse blood
vessel contraction.
Inotropes Increase or decrease the force of myocardial contraction.
Chronotropes Increase or decrease heart rate.
Dromotropes Increase or decrease conduction velocity.
Vasopressors Increase or decrease vascular smooth muscle tone.
Positive inotropes catecholamines, calcium, Milrinone (primacore), and digoxin
Negative inotropes beta-blockers, calcium channel blockers
positive chronotropes atropine, dopamine, dobutamine, epinephrine.
negative chronotropes beta-blockers, digoxin, cardizem
positive dromotropes atropine, sympathomimetics
negative dromotropes digoxin, verapamil, diltiazem
sympathomimetic agents (catecholamines) Stimulate B-1, B-2, and alpha receptors.
B-1 receptors inotropic, chronotropic, and dromotropic effects.
B-2 receptors smooth muscle relaxation which can result in vasodilation and a decrease
in systemic vascular resistance (SVR).
, Alpha receptors vasoconstriction, increase in SVR, increase in blood pressure; can cause
decrease in CI due to the increase in after load.
Sympathomimetic drugs dobutamine, dopamine, epinephrine, norepinephrine (Levo),
phenylephrine (Neo).
Dobutamine B-1 and B-2 effects
dopamine B-1 at 1-2 mcg/kg/min
alpha at 10 mag/kg/min
epinephrine B-1 + B-2 at .01-.03mcg/kg/min
alpha > .03 mag/kg/min
epi notable effects blood sugar can increase. K will go into cells --> drop in K levels. When
blood sugar fixes --> K can shoot up.
Norepinephrine some B-1; mostly alpha effects
Phenylephrine pure alpha
phosphodiesterase inhibitors (milrinone) -do not affect adrenergic receptors
-increase myocardial contraction (increase CI) and venous/arterial dilation (decrease preload
and SVR).
beta blockers negative inotropes, decrease contractility, decrease HR, and recuse blood
vessel contraction.
