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1·P2 may be augmented in pulmonary hypertension and diminished in pulmonic stenosis.

肺动脉高血压可加剧P2，肺动脉瓣狭窄时则P 2减轻。

2·Objective: to improve the diagnostic rate of pulmonic stenosis using two dimensional and Doppler echocardiography and to reduce the rate of misdiagnosis.

目的：提高二维及多普勒超声对肺动脉口狭窄的诊断正确率，降低漏诊率。

3·Objective To explore the diagnosis value of contrast echocardiography of right heart in the atrial septal defects (ASD) complicated with pulmonic stenosis (PS).

目的探讨右心声学造影对合并肺动脉口狭窄(PS)的房间隔缺损(A SD)的诊断价值。

4·Objective: to provide anatomic basis for choosing a donator with a suitable pulmonary artery diameter with receptor during extension of congenital pulmonic stenosis and lung transplantation.

目的：为先天性肺动脉狭窄扩张术和肺移植术选择与受体肺动脉直径相配的供体提供解剖学基础。