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- Revasc. w/ CABG >90 days + LVEF 30% & below + NYHA1 (cardiac disease but without limitations of physical activity) - implant ICD
- Supravalvular aortic stenosis can cause unequal upper extremity arterial pulsations but SUBvalvular aortic stenosis can NOT cause unequal upper extremity arterial pulsations
- Verapamil is contraindicated with dofetilide because it increases serum level of dofetilide
- Resuscitated from a cardiac arrest + LQTS diagnosed on post-cardiac arrest ECG, next do genetic testing
- A murmur at second left intercostal space, throughout systole and diastole, and peaks with S2, does not change with position or rotation of head - is continuous murmur due to a congenital shunt, PDA
- Flecainide has proarrhythmia at increased heart rates because of use dependence property (increased drug effect at increased heart rates)
- MI 40 days or more + able to do usual activities, limited when trying to walk upstairs (NYHA II III comfortable at rest. Ordinary II/less than ordinary III physical activity results in fatigue, palpitations, dyspnea, anginal pain) + LVEF 35% or below + NSR LBBB QRS 150 ms or above - Implant biventricular defibrillator MI II/III 35% (40d ICD ~ NSR LBBB 150ms CRT)
- Cardiac tamponade (large circumferential pericardial effusion, jugular venous distention, and hypotension) Echo: exaggerated decrease in mitral inflow velocity during inspiration
- Tamponade + advanced AR - no pulsus paradoxus
- Antiarrhythmic drugs with reverse-use dependence have greater efficacy for arrhythmia prevention than termination and have greater risk for ventricular proarrhythmia at slower heart rates
- Cardiac Arrhythmia Suppression Trials (CAST I and II) flecainide, encainide, and moricizine effectively suppressed PVCs in postinfarction period