Atrial Fibrillation, AF(心房顫動)

症狀/併發症(symptom/complication)	@heart rate is up to 350~400/Min @sustained: longer than 30 seconds @Palpitations @chest tightness @dyspnea @syncope @heart failure @stroke: thrombus from atrium to brain @mediated cardiomyopathy @heart enlargement @Thromboembolic events complication @thrombosis in atrium
病因(etiology)
檢查/準則(examination/criteria)	#ECG: P wave is absent and QRS is irregular 資料來源：afib.utorontoeit ##P wave in Leads I, II, and III show the classical appearance of AF, the "undulating baseline" 資料來源：dochemp #evaluation: CHADS2 Score
治療(treatment)	$CHADS2 Score>2 use warfarin to prevent thrombosis $CHADS2 0 or 1-->use aspirin to prevent thrombosis $catheter modification/ablation $AV node blocker: digoxin, verapamil, beta-blockers $anti-arrhythmia drug: Class IC, III $electrical cardioversion $心臟再同步化治療(Cardiac resynchronization therapy, CRT) $Anticoagulants, ex: warfarin to prevent thrombosis
鑑別診斷(Differential Diagnosis)
流行病學(Epidemiology)	+most common arrhythmia +elder and hypertension patient is usually seen

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