Cardiovascular Drugs MOA Flashcards
Method of action of digoxin
Vagomimetic- slows conduction AV node and increases vagal tone in ventricles
Increases availability of intracellular Ca2+ and decrease Na/K ATPase activity in cardiomyocyte
What class of drug is digoxin?
Cardiac glycoside (class 5)
What class of drug is esmolol?
Selective Beta 1 blocker (class II)
What class of drug is lidocaine?
Sodium channel blocker (class Ib)
Name two side effects of esmolol?
Hypotension
Bradycardia
Method of action of diltiazem?
Calcium channel blocker
Non dihydropyridine
Slows conduction through the AV node
Prolongs PQ interval
Prolongs refractory time
Weak negative inotrope effects
Esmolol method of action
Class II antiarrhythmic drug (beta blocker)
Blocks beta 1 adrenergic receptors in myocardium
Method of action procainamide
Class Ia binds and inhibits fast sodium channels
Name two drugs that can be used to manage supraventricular tachyarrhythmias?
Atenolol (selective b1 blocker) and propranolol (non-selective b1,b2)
What receptors does vasopressin act on?
V1 receptor on vascular smooth
Muscle
Under what circumstances do arterial clots form?
High shear force
Endothelial damage
Platelet rich, fibrin poor
Antiplatelet therapy
Under what circumstances do venous blood clots form
Low shear conditions
Fibrin and RBC rich, platelet poor
Platelet number less focussed on platelet number and function
Anticoagulant therapy
Under what circumstances do venous clots form
Low shear
Fibrin and rbcs rich, platelet poor
Formation less dependent on plt number and function
Anticoagulant therapy
What is the method of action of sildenafil?
Inhibits cyclic guanosine monophosphate (cGMP) specific PDE5 which leads to increase in GMP and nitric oxide mediated vasodilation of smooth muscle in pulmonary and decreases lower oesophageal tone
