Background - Congenital heart disease can be complicated by pulmonary arterial hypertension (PAH), the reversibility of which is often difficult to predict.
背景-——先心病由于肺动脉高压而变得更加复杂，肺动脉高压的可逆性常难以预测。
Background - Congenital heart disease can be complicated by pulmonary arterial hypertension (PAH), the reversibility of which is often difficult to predict.
背景-——先心病由于肺动脉高压而变得更加复杂，肺动脉高压的可逆性常难以预测。
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