-
Digoxin
- Decrease AV nodal conduction
- Inhibit Na/K/ATPase
- Increase Ca conc in heart cells = increase in contraction force
- Tx CHF and Atrial Flutter - inotropic - decreases K levels = dig Toxicity
-
Diltiazem
- Tx Black men
- Tx AV nodal re entrance
-
Quinidine
- Decrease AV nodal conduction. Cinchonism
- Anticholinergic = aggravate MG
- Hypotension = alpha block
Class Ia anti-arrhythmic - moderate Na channel block
-
Quinidine pre tx
Atrial arrhythmia pre tx w/ drug that will decrease ventricular responses: Dig, Beta (-), Ca Ch (-)
-
Verampil
- Decrease AV nodal conduction. Decrease BP
- Negative inotrope = no CHF use
- Increase O2 supply via decrease in vasospasm
- Tx Prinzmetal's variant angina
-
Propranolol
- Decrease AV nodal conduction. Decrease BP
- Negative inotrope (= beta block)
- Aggravates asthma and DM via the beta 2 block
Blocks reflex tachy but causes excess brady = increase distole time = increased EDV
-
Diazoxide
balanced vasodilator
-
Nitroprusside
- Balanced vasodilator. Unloads heart
- Increases cyanide = pre tx w/thiosulfate
- Tx - acute HTN crisis
-
Reserpine
Tx severe resistant HTN. Depletes Ca, see stuffy nose. No to pts w/ peptic ulcers
-
Dobutamine
High doses beta 2 (+) offset alpha1 = beta1 increase CO w/o systemic vascular resistance
-
Dopamine
At low doses tx shock = dilates renal and mesenteric aa = maintain urine output
-
Esmolol
Short acting beta (-)
-
Captopril
- Balanced vasodilator
- Tx output CHF, see dry cough (bradykinin induced)
-
Dig Toxicity
Fatal ventricular arrhythmia's w/ severe AV block
-
Lidocaine
- Class Ib anti-arrhythmic. Normalizes conduction
- Tx initial MI = control arrhythmia
-
Flecanide
Class Ic anti-arrhythmic. Marked conduction slowing
-
Amiodarone
- Long t 1/2 = need potent doses to obtain desired levels for action
- See blue skin, ocular deposits, pulmonary finrosis
-
NE
- Increase AV node conduction via beta 1
- Metoprolol (-) beta 1
-
Ach
- Decrease AV node conduction via M receptor
- Atropine (-) M-r
-
Atenolol
Controls catecholamine induced arrhythmia
-
Brethylium
Tx Malignant Ventricular Arrhythmia but causes passing catecholamine release that can aggravate arrhythmia briefly
-
Nimodipine
Tx Acute subarachnoid hemorrhage by preventing post hemorrhagic vasospasm
-
Atropine
decreases excess vagal tone as seen in Sinus Bradycardia
-
Nitrates
Decrease preload = venous pooling. Decrease MVO2 = reflex tachy. increase ventricular work = decrease O2 demand
-
Aspirin
Prevents arterial platelets adhesion (not DVT thrombi). Inactivates COX = decrease platelet production of TxA2, a potent vasoconstrictor
-
Warfarin
(-) Vit K dependent gamma carboxylation of clotting factors = anticoagulation state
-
Heparin
Dependent on antithrombin III activation
-
TPA
- Binds to fibrin clots and activates plasminogen on the spot, Short t 1/2, give IV
- Does not discriminate b/t fibrin-based clots = bleeding and stroke complications
-
Streptokinase
From bacteria = allergies arise. Can see excess bleeding in post-op pts
-
Urokinase
Human source, increase plasmin. Can see excess bleeding in post-op pts
-
Colestipol
- Bile acid sequestrates. Interrupt bile acid reabsorption = increased LDL uptake
- Cholestyramine has same MOA
-
Lovastatin
- HMGCoA reductase (-) = increase LDL-r synthesis.
- Pravastatin / Mevastatin same MOA
-
Losartin
- Decreased aldosterone
- Increased Renin 2-3x's
-
Diazoxide
- Tx insulinomasNot balanced vasodilator = only dilates arterial SM
-
Clonidine
Central alpha2 (+). Decreases TPR via decreased sympathetic effect
-
Methyldopa
Central alpha2 (+). (++) Coombs = Hemolytic anemia
DOC for pregnancy induced HTN
-
Phenytoin
Class Ib reverse mild AV block due to digtoxin toxicity
-
Procainamine
Class Ia - SLE liek syndrome
-
Indopamide
Only thiazide that will have no effect on cholesterol
-
Thiazides
Older black men w/ HTN due to Increased Renin
-
Beta (-)
Young white men w/o asthma (causes bronchospasm)
-
ACEIs
- (-) change AI --> AII. (-) Bradykinin inactivation
- Captropil / Enalapril
- Causes renal failure = use w/ caution in elderly
- Vasodilate renal efferents > than afferent : decrease GFR and Filtration pressure
- Decrease diabetic renal failure progression
-
Epi
- Increase contraction rate & force via Beta1
- Increase systolic but decrease in diastolic BP
- Decreased in peripheral resistance via beta2 vasodilation
-
Norepi
- Increase HR and systolic and diastolic BP
- Increase peripheral blood vessel resistance
-
Class II
Beta (-), decrease risk of reinfarction and sudden death following MI
-
"Grey Man"
Amiodarone: class III anti-arrhythmia
-
Beperidil
Ca Ch (-). Limited clinical use due to Torsades de Pointes
-
Adenosine
- Its receptor is blocked by Methylxanthines (Theophyline)
- Favored for tx of Reentrant Spura Ventricular Tachycardia
-
Enoxaparin
Low molecular weight heparin = Oral anticoagulant
-
Isoproterenol
Increased HR and decreased MAP
-
Variant angina
Use Ca Ch (-) (Nifedipine)
-
Contraindicated in CHF
Beta(-) = you don't want to decrease heart's pumping strength
|
|