Cardiac Flashcards
What is an inotrope?
Changes the force of contractility
What is a chronotrope?
Changes the heart rate
What would you use to treat sepsis?
Inotropes
Is adrenaline/noradrenaline a Beta 1, alpha 1, beta 2 adrenoceptor agonist or antagonist?
Agonist
What effect does adrenaline/noradrenaline have on beta 1 adrenoceptors?
Increase heart rate
Increase contractility
What effect does an agonist have on alpha 1 adrenoceptors?
Vasoconstriction
What are the down sides to adrenaline/ noradrenaline as a treatment?
They aren’t selective
What is Dopamine?
A Beta 1 selective adrenoceptor agonist
What effect does dobutamine have? And when would you use it?
Increases heart rate and contractility
Acute heart failure, surgical shock, sepsis
What drug is common heart failure treatment?
Digoxin
Is Digoxin a inotrope or chronotrope?
Inotrope
How does Digoxin work?
Stops ATPase = increase Ca in cell = inotrope
What is angina?
Lack of oxygen to heart
What would you use in acute angina?
GTN
What is an issue with GTN?
Tolerance