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lazzsant
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Drugs and factors that prolong QT intervals?
- Defects in cardiac sodium or potassium channels
- Macrolides (erythromycin)
- Antimalarials (chloroquine, mephaquine)
- Haloperidol
- Risperidone
- Methadone
- Protease inhibitors
- Antiarrythmics (class IA)
- K+ channel blockers
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Treatment of Torsades de Pointes
Magnesium
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What is the treatment for the syndrome that produces delta waves through the use of bundle of Kent?
- Wolff-Parkinson-White syndrome
- TX: Procainamide and Amiodarone
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What microorganism leads to AV nodal block?
Borrelia burgdoferi = complete heart block
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Stimulation and MOA of ANP
Increase in blood volume and atrial pressure = activation
- MOA:
- vascular relaxation
- constricts efferent arteriole and dilates afferent arteriole = increased diuresis.
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Cushing triad and and how it is started?
- Hypertension
- bradycardia
- respiratory depression
INcreased ICP constricts arterioles -> cerebral ischemia -> sympathetic hypertension(restore blood flow to brain) -> reflex bradycardia -> increased pressure on brainstem -> depressed respirations
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Heart defect associated with Turners syndrome
- Infantile type coarctation of the aorta.
- Preductal
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What keeps the PDA open in the neonatal period?
PGE synthesis and low O2 tension
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Congenital cardiac defect assoicated with congeital rubella
- Septal defects
- PDA
- pulmonary artery stenosis
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Monckeberg
- Calicification in the media of the arteries, esp radial or ulnar.
- Benign, no blood flow obstruction, and intima not involved.
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Untreated streptococcus pyogenes.
- Rheumatic fever
- Antigenic similaritiy between bacterial antigens and normal "self" antigens in the heart and CNS lead to anti-self antibodies.
- myocarditis -> mitral/aortic insufficiency
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What occurs 5-10 days after an MI?
GROSS: Hyperemic border; central yellow brown softening
Risk for free wall rupture, tamponade, papillary muscle rupture, interventricular septal rupture; due to macrophages degrading important structural components.
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Causes of Dilated cardiomyopathy
- Alcohol
- wet beriberi
- Coxsackie B viure myocarditis
- chronic cocaine use
- Chagas disease
- Doxorubicin
- Hemochromatosis
- peripartum cardiomyopathy
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Difference between Osler's nodes and Janeway lesions
Osler's nodes- tender raised lesions on finger or toe pads
Janeway Lesions- small painless erythematous lesions on palm or sole
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JONES in Rheumatic heart disease
- Joints (migratory polyarthtritis)
- O pancarditis
- Nodules subcutaneous
- Erythema marginatum
- Sydenham's Chorea
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Treatment of disease that is characterized by focal necrotizing vasculitis, necrotizing granulomas in the lung and upper airway, and necrotizing glomerulonephritis
Wegeners granulomatosis
TX: Cyclophosphamide and corticosteroids
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2 p-ANCA positive vasculitides
- Microscopic polyangiitis:
- ~ Wegeners without the granulomas
- Affects small vessels
- Churg-Strauss syndrome:
- granulomatous vasculitis with eosinophilia
- Present with asthma, sinusitis, skin lesions, and peripheral neuropathy
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Kawasaki disease
Acute, self limiting necrotizing vasculitis in infants/children. Associated with asian ethnicity.
changes in lips/oral mucosa, lymphadenitis, desquamative skin rash. May develop coronary aneurysms.
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Bacillary angiomatosis
Benign capillary skin papules found in AIDS patients. Caused by Bartonella henselae infections.
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Essential hypertension therapy
- Diuretics(thiazide)
- ACE inhibitors
- angiotensin II receptor blockers
- calcium channel blockers
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Hydralazine
increase cGMP -> smooth mucle relaxation -> afterload reduction
- FOR:
- severe hypertension(also pregnancy with methyldopa)
- CHF
- S/E: compensatory tachycardia
- increase renin release
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Fenoldopam
Dopamine D1 receptor agonist
relaxes renal vascular smooth muscle
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Diazoxide
K+ channel opener
- Hyperpolarizes and relaxes vascular smooth muscle.
- Can cause hyperglycemia
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Names of drugs in Dihydropyridine CCB
- Nifedipine
- Amlodipine
- Felodipine
- Nicardipine
- Nisoldipine
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Partial B-agonists contraindicated in angina
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Digoxin
- MOA:
- inhbits Na/K ATPase
- stimulates vagus nerve -> decreased conduction at AV node and depression of SA node
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