IX - Cardiovascular Drugs Flashcards
Formula for BP
CO x SVR
Extended Formula for BP
HR x SV x SVR
First-line drug for essential hypertension
Hydrochlorothiazide (↓BP by 10-15 mmHg)
Hypertension with co-morbid CHF/DM, SE: cough, angioedema, contraindicated in bilateral renal artery stenosis
ACE Inhibitor (Captopril)
ACE inhibitor tolerance
ARB (Losartan)
Hypertension with co-morbid BPH
Prazosin/Tamsulosin
Pre-eclampsia, maintenance medication, SE: (+) Coomb’s hemolytic anemia
Methyldopa
Pre-eclampsia, acute BP lowering, SE: reflex tachycardia, drug-induced lupus
Hydralazine
Hypertensive emergency, SE: hypertrichosis
Minoxidil
Hypertensive emergency, SE: cyanide poisoning
Nitroprusside
Antidote for cyanide poisoning
inhaled Amyl Nitrite + IV Na Nitrite + Na Thiosulfate
Part of the ETC affected by cyanide
Complex IV (Cytochrome C Oxidase)
Relief of acute anginal attacks, SE: headache
Nitroglycerin/ISDN
Angina maintenance medication, VASCULAR > cardiac, SE: flushing, edema, gingival hyperplasia
Nifedipine
Angina maintenance medication, vascular < CARDIAC, vasospastic angina, Raynaud’s phenomenon
Diltiazem
Supraventricular tachycardia, vascular < CARDIAC, SE: gingival hyperplasia
Verapamil
Why do patients taking nitrates usually experience throbbing headaches?
meningeal artery vasodilation
Why is Ca-dependent neurotransmission or hormone release not affected by CCBs?
CCBs block L-type Ca channels (other channels are N, P & R)
Drugs that cause gingival hyperplasia
Nifedipine, Cyclosporine, Phenytoin, Verapamil
Positive inotrope for heart failure, SE: arrythmias (PVC, AVB), red-green color blindness, yellow visual halos
Digoxin (foxglove)
Treatment of pulmonary edema in CHF
Loop Diuretic (Furosemide)
First-line drug for chronic CHF, cardioprotective
ACE-I, ARB
Improves survival in CHF
ACE-I, β-Blocker, Aldosterone Antagonist (Spironolactone)
Decreases hospitalization in CHF
Digoxin
Improves survival in CHF patients of African-American descent
Hydralazine + ISDN
Treatment of all types of arrhythmias, Wolff-Parkinson-White , SE: drug-induced lupus
Procainamide (IA)
Arrhythmias, SE: cinchonism (headaches, tinnitus, vertigo)
Quinidine (IA)
Post-MI arrhythmias, digitalis arrhythmias, SE: seizures
Lidocaine (IB)
Refractory arrhythmias, contraindicated post-MI
Flecainide (IC)
Perioperative and thyrotoxic arrhythmias, SVT
Esmolol (II)
Arrhythmias, SE: dose-dependent torsades de pointes
Sotalol (II)
Most efficacious anti-arrhythmic, SE: skin deposits, pulmonary fibrosis, hyper/hypothyroidism
Amiodarone (I, II, III, IV)
Outpatient management of SVT, SE: gingival hyperplasia
Verapamil (IV)
Class IA Anti-Arrythmics
Quinidine, Procainamide, Disopyramide
Class IB Anti-Arrythmics
Mexiletine, Tocainide, Lidocaine
Class IC Anti-Arrythmics
Propafenone, Flecainide, Encainide
Anti-Arrythmics: Na-channel
Class I
Anti-Arrythmics: β-adrenoreceptor
Class II
Anti-Arrythmics: K-channel
Class III
Anti-Arrythmics: Ca-channel
Class IV
AP Duration: Class IA Anti-Arrythmics
prolonged
AP Duration: Class IB Anti-Arrythmics
shortened
AP Duration: Class IC Anti-Arrythmics
no effect
AP Duration: Class II Anti-Arrythmics
no effect
AP Duration: Class III Anti-Arrythmics
prolonged
AP Duration: Class IV Anti-Arrythmics
no effect
ECG: Class IA Anti-Arrythmics
prolonged PR, QRS, QT
ECG: Class IB Anti-Arrythmics
no effect on normal cells
ECG: Class IC Anti-Arrythmics
prolonged QRS
ECG: Class II Anti-Arrythmics
prolonged PR
ECG: Class III Anti-Arrythmics
prolonged QT
ECG: Class IV Anti-Arrythmics
prolonged PR
Drugs that cause agranulocytosis
Clozapine, Co-trimoxazole, Aminopyrine, Phenylbutazone, Indomethacin, Tocainide, Colchicine, PTU
Amiodarone Toxicity
Corneal deposits, Skin deposits, Pulmonary fibrosis, Tremors, Paresthesia, Thyroid dysfunction
Why are dihydropyridine CCBs not useful as anti-arrhythmics?
facilitate arrhythmias
Acts on the PCT, laucome, mountain sickness, SE: NAGMA, hepatic encephalopathy
Acetazolamide (carbonic anhydrase inhibitor)
Acts on the TAL, pulmonary edema, most efficacious, SE: ototoxicity, hypokalemia, hypocalcemia
Furosemide (loop diuretic)
Acts on the DCT, SE: hyperglycemia, hyperlipidemia, hyperuricemia, hypercalcemia
Hydrochlorothiazide (thiazide)
Acts on the CCD, SE: gynecomastia, hyperkalemia
Spironolactone (aldosterone antagonist)
Acts on the PCT, DCT & CCD, rhabdomyolysis, increased ICP, contraindicated in heart failure
Mannitol (osmotic diuretic)
Causes of HAGMA
Methanol, Uremia, DKA, Paraldehyde, Isoniazid, Lactic Acidosis, Ethanol, Salicylates
Causes of NAGMA
Hyperalimentation, Acetazolamide, Renal Tubular Acidosis, Diarrhea, Ureteral Diversion, Pancreatic Fistula
Loop Diuretic Toxicity
Ototoxicity, Hepatotoxicity, Dehydration, Allergy to Sulfa, Nephritis, Gout
Thiazide Toxicty
hyperGlycemia, hyperLipidemia, hyperUricemia. hyperCalcemia
Drugs that cause gynecomastia
Spironolactone, Digoxin, Cimetidine, Amiodarone, Ketoconazole
K-Sparing Drugs
Spironolactone, Triamterene, Amiloride, Eplerenone