Cardiovascular Drugs Flashcards
Examples of anti platelet drugs
Aspirin
Clopidogrel
Ticagrelor
Prasugrel
What are anti-platelets used to treat?
MI
Unstable angina
What are the potential side effects of anti-platelets?
Bronchospasm
GI irritation
GI haemorrhage
What is the target effect of anti-platelets?
Reduce platelet aggregation and arterial thrombosis
Examples of B blockers
Atenolol
Bisoprolol
Metoprolol
Propranolol
What are B blockers used to treat?
Heart failure MI Hypertension Angina Arrhythmia
What is the target effect of B blockers?
Lower CO and reduces the force of cardiac contraction
What is the basic mechanism of B blockers?
blocks B-adrenoreceptors
What are the adverse effects of B blockers?
provocation of asthma conductance block heart failure fatigue cold hands
Examples of calcium channel blockers
amiodipine
nifedipine
verapamil
What are calcium channel blockers used to treat?
Hypertension
Angina
What is the target effect of calcium channel blockers?
vasodilatation
What is the basic mechanism of action of calcium channel blockers?
They block L type calcium channels preventing Ca entry, there is smooth muscle relaxation and so vasodilatation (reduced TPR so lower BP)
What are the potential side effects of calcium channel blockers?
Dizziness
hypotension
flushing
ankle oedema
Examples of ACE inhibitors
lisinopril
ramipril
enalapril
What are ACE inhibitors used to treat?
hypertension
heart failure
Physiological effect of ACE inhibitors
Vasodilatation
What is the basic mechanism of ACE inhibitors?
They reduce the synthesis of angiotension II which is a potent vasoconstrictor
What are the potential side effects ACE inhibitors?
DRY COUGH proteinuria neutropenia hyperkalaemia renal failure angioedema
Examples of A1 antagonists
Proxosin
Doxazosin
What are A1 antagonists used to treat?
resistant hypertension
Physiological effect of A1 antagonists
vasodilatition
What is the basic mechanism of A1 antagonists?
they block the vascular A1 receptors
What are the potential side effects of A1 antagonists?
postural hypotension
What is the basic mechanism of anti-platelets?
they convert plasminogen to plasmin, dissolving thrombi
Examples of thiazide diuretics
bendroflumethiazide
What are thiazide diuretics used to treat?
heart failure
hypertension
Physiological effect of thiazide diuretics
initially decrease blood volume and therefore reduce CO
Once CO is normal the TPR remains reduced
What is the basic mechanism of thiazide diuretics?
act on the distal tubule to stop NO being reabsorbed
Cause increased excretion of Na and Cl
lowers blood volume
What are the potential side effects of thiazide diuretics?
Hypokalaemia hyperuricaemia impotence weakness gout skin rashes
Examples of loop diuretics
Furosemide
What are loop diuretics used to treat?
Severe heart failure
Physiological effects of loop diuretics
Decrease the extent of pulmonary and peripheral oedema
What is the basic mechanism of loop diuretics?
inhibit sodium absorption in the ascending loop of henle
What are the potential side effects of loop diuretics?
hyponatraemia hypotension hypokalaemia hypovolaemia deafness
Examples of potassium sparing diuretics
Spironolactone
What are potassium sparing diuretics used to treat?
severe heart failure
liver disease with ascites
Physiological effects of potassium sparing diuretics
decreases oedema
decreases ascites
What is the basic mechanism of potassium sparing diuretics?
competitively block the binding of aldosterone
increase sodium excretion
decrease potassium excretion
What are the potential side effects of potassium sparing diuretics?
GI disturbance Hepatotoxicity confusion malaise dizziness
Examples of HMG-CoA Reductase-i
atrovastatin
simvastatin
provaststin
What are statins used to treat?
hyperlipidaemia
Physiological effect of statins
lower total and LDL cholesterol
What is the basic mechanism of statins
block the synthesis of cholesterol in the liver
hepatocytes express more LDL receptors
incomplete compensatory mechanism
increased clearance of cholesterol
What are the potential side effects of statins
myopathy
Examples of vitamin K antagonists
warfarin
What are vitamin K antagonists used to treat?
venous throbosis and embolism
Physiological effect of vitamin K statins
anticoagulation
What is the basic mechanism of vitamin K antagonists?
blocks vitamin K dependent carboxylation
meaning modified clotting factors V, VII, IX, X cannot bind to calcium
What are the potential side effects of vitamin K antagonists?
haemorrhage
Examples of glycosaminoglycans
heparin
LMWH
What are glycosaminoglycans used to treat?
venous thrombosis embolism
Physiological effect of target organ
anticoagulation
What is the basic mechanism of glycosaminoglycans?
heparin - increases complex formation between antithrombin III and thrombin which causes thrombin to be inactive
Factor Xa is inhibited
What are the potential side effects of glycosaminoglycans?
haemorrhage
Examples of fibrinolytic drugs
Streptokinase
Alteplase
What are fbrinolytic drugs used to treat?
MI
Physiological effect of fibrinolytic drugs
thrombolysis
What is the basic mechanism of fibrinolytic drugs?
they activate plasminogen to plasmin which dissolves the thrombi
What the potential side effects of fibrinolytic drugs?
bleeding
nausea
vomiting
allergic reactions
Examples of class 1A antiarrhythmatic drugs
procainamide
disopyramide
What are class 1A antiarrhythmatic drugs used to treat?
ventricular arrhythmias
Physiological effect of class 1A antiarrhythmatic drugs
slow phase 0 and increase the refractory period
What is the basic mechanism of class 1A antiarrhythmatic drugs?
they block the open voltage dependent sodium channels
What are the potential side effects of class 1A antiarrhythmatic drugs?
Hypotension
nausea
vomiting
Examples of class 1B antiarrhythmatic drugs
lidocaine
What are class 1B antiarrhythmatic drugs used to treat?
Ventricular arrythmias
What is the basic mechanism of class 1B antiarrhythmatic drugs?
blocks inactivated sodium channels in ischemic areas
What are the potential side effects of class 1B antiarrhythmatic drugs?
dixiness
feeling inebriated / light headed
drowsiness
blurred vision
Examples of class 1C antiarrhythmatic drugs
Flecainide
Physiological effect of class 1C antiarrhythmatic drugs
slow phase 0 and increase the refractory period
What are class 1C antiarrhythmatic drugs used to treat?
Atrial fibrillation
What is the basic mechanism of class 1C antiarrhythmatic drugs?
dissociates form Na channels slowly depressing conduction
Potential side effects of class 1C antiarrhythmatic drugs
hypotension
Examples of class 3 antiarrhythmatic drugs
amiodarone
What are class 3 antiarrhythmatic drugs used to treat?
supraventricular and ventricular arrhythmias
Physiological effect of class 3 antiarrhythmatic drugs
slow repolarisation which prolongs the action potential and the refractory period
What is the basic mechanism of class 3 antiarrhythmatic drugs?
They block any channels
What are the potential side effects of class 3 antiarrhythmatic drugs?
photosensitivity
neuropathy
thyroid disorders
pulmonary alveolitis
Examples of glycosides
Digoxin
What are glycosides used to treat?
AF
atrial flutters
severe heart failure
Physiological effects of glycosides
increase force of cardiac contraction
What is the basic mechanism of glycosides?
increasing intracellular calcium
increasing the force of myocardial contraction
What are the potential side effects of glycosides?
heart block
VT
VF
Examples of nitrates
GTN
isosorbide
dinitrate
What are nitrates used to treat?
angina
MI
Physiological effect of nitrates
vasodilatation
What is the basic mechanism of nitrates
nitrate is converted to nitric oxide
NO activates the cGMP
cGMP activates the PKG
which causes smooth muscle relaxation
What are the potential side effects of nitrates?
Headache
hypotension
syncope
tolerance