Atrial enlargement/Atria dilatation(心房變大/心房擴大)

症狀/併發症(symptom/complication)	@atriums only have enlargement, do not have hypertrophy
病因(etiology)	|right atrial enlargement ||COPD=Chronic obstructive pulmonary disease ||Pulmonary hypertension(肺高壓) ||Pulmonary emboli ||Eisenmenger's syndrome:  left to right shunt caused by a congenital heart defect in the fetal hear, including |||Atrial Septal Defect, ASD(心房中膈缺損) |||Ventricular septal defect, VSD(心室間隔缺損) |||patent ductus arteriosus, PDA(開放性動脈導管) ||Tetralogy of Fallot(法洛氏四合症) ||tricuspid atresia ||pulmonary stenosis ||Normal variant: thin pesron and cardiac axis +90 vertical heart |left atrial enlargement ||mitral valve disease |||mitral valve stenosis |||mitrla valve regurgitation ||congestive heart failure, CHF ||Congenital heart disease |||Ventricular septal defect, VSD(心室間隔缺損) |||patent ductus arteriosus, PDA(開放性動脈導管)
檢查/準則(examination/criteria)	#ECG #normal atrium #right atrial enlargement ##higher P wave in lead II ###V1: p wave higher than 15mm ###lead II：p wave higher 2.5mm #left atrial enlargement ##negative portion of V1>1*1(凹陷面積) ##leadII ：notched( M shaped) p wave and duration longer than 3 small box（0.12秒）=p mitrale 資料來源：medicine-on-line
治療(treatment)
鑑別診斷(Differential Diagnosis)
流行病學(Epidemiology)

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