Cardio Drugs Flashcards
Give examples of ACE Inhibitors (ACE Is)
“pril”
Ramipril, Lisinopril and Quinapril
MoA of ACE Is
Inhibit ACE from converting angiotensin I into angiotensin II (a vasocontrictor)
Effect of ACE Is
Vasodilate, causing a reduce in blood pressure
Give examples of Angiotensin Receptor Blockers (ARBs)
“sartan”
Valsartan, Losartan and Eprosartan
MoA of ARBs
They are antagonists to angiotensin II (a vasoconstrictor)
Effect of ARBs
Vasodilate, causing a reduce in blood pressure
Give examples of Beta 1 Blockers (BBs)
“olol”
Atenolol, Bisoprolol, Metropolol
Give examples of Nonselective Beta Blockers (BBs)
“olol”
Propanolol
MoA of B1Bs
They block B1 adrenoceptors
Effect of B1Bs
- Decrease the force of contraction of the heart
- Decrease the HR
MoA of Nonselective BBs
They block both B1 and B2 adrenoceptors
Effect of Nonselective BBs
Basically blocks sympathetic responses:
- Decreases the HR (reduced SA-AV node conduction)
- Decreases force of contraction of the heart
- Have an antiarrhythmic effect
- Reduce Renin, so decrease BP
Give examples of Calcium Channel Blockers (CCBs)
Smooth Muscle selective: “dipines”
Amlodipine, Nifedipine and Felodipine
Cardio selective: Verapamil
Others: Diltiazem
MoA of CCBs
Block L-type Ca2+ channels in Smooth muscle
Effect of CBBs
- Vasodilation (Coronary and peripheral), so reduces BP
- Reduces myocardial oxygen consumption rate
Give examples of Anti-Arrhythmic drugs?
Digoxin, Adenosine, Amiodarone, Verapamil, Magnesium Sulphate
MoA of Digoxin
Blocks Na+/K+ pump, slowing AV node conduction
MoA of Verapamil
Blocks L-type Ca2+ channels, slowing AV node conduction
MoA of Adenosine
Stimulates adenosine receptor that inhibits adenyl cyclase, therefore inhibiting Ca2+ influx.
It hyperpolarises the AV node, suppressing conduction.
MoA of Amiodarone
Slows conduction of the SA and AV nodes
Give examples of Alpha Blockers
“zosin”
Prazosin and Doxazosin
MoA of A1 Blockers
Block A1 receptors
Effects of A1 Blockers
Vasodilation
Give examples of Nitrates
Short acting: Glyceryl trinitrate (GTN)
Long acting: Isosorbide mononitrate
MoA of Nitrates
They metabolise to produce NO, increasing cGMP, activating kinase A causing relaxation.
Also keeps K+ channels open.
Effect of Nitrates
Vasodilation
MoA of Ivabradine
It inhibits the funny channel and therefore inhibits the pacemaker activity of the SA node
Effect of Ivabridine
Decreases the HR
Give examples of Diuretics
Thiazide: Bendroflumethiazide
Loop: Furosemide
Others: Spironolactone