Multifocal atrial tachycardia,”Need at least 3 different P wave morphologiesSeen in severe pulmonary diseasePresents like wandering atrial pacemaker but is tachycardic Electrical cardioversion is inappropriate for treatment Treat underlying disease and can use CCBs, B-blockres, digoxin, etc if LV function is preserved.If LV function is not preserved, used digoxin, diltiazem

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Atrial fibrillation basics,”Atrial rate is >400bpm but most impulses are blocked at AV node, so rate is between 75-175Causes can be from heart disease, pericarditis, pericardial trauma, pulmonary disease, hyper or hypothyroidism, systemic illness, stress, excessive ETOH, sick sinus syndrome, pheochromocytoma pulse ECG: irregular RR intervals and excessive series of tiny, erratic spikes

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