Because transthoracic echocardiography is an inexpensive, easy, and reproducible method, it is the most commonly used noninvasive diagnostic tool to determine pulmonary arterial pressure.

• 因为经胸超声心动图费用低、操作简便，可重复的检查方法，这是一种应用最广的无创性诊断肺动脉高压的方法。