卵圆孔未闭患者右向左分流程度评估：经胸超声与经食道超声对比研究

Translation: The detection rates of right-to-left shunt degree (PFO-RLS) in patients with patent foramen ovale (PFO) using contrast transthoracic echocardiography (cTTE) at rest and during Valsalva maneuver showed no significant difference compared to contrast transesophageal echocardiography (cTEE), but the detection of shunt degree was higher with cTEE. However, during cTEE, when patients performed the Valsalva maneuver and the operator applied abdominal pressure by making a fist and relaxing, the right-to-left shunt degree in PFO patients could be significantly increased. Combined with transesophageal echocardiography, it has great value in diagnosing the anatomical structure and morphology of PFO and assessing PFO treatment and closure procedures.