[A right-to-left shunt through a patent foramen ovale without pulmonary hypertension].

We report the case of a man 67-years-old with right-to-left shunt through a patent foramen ovale in absence of pulmonary hypertension. The contrast and transesophageal echocardiography showed significant right-to-left shunt and provided insight about the mechanisms that cause it. The aortic root was enlarged compressing the right atrium. Surgical repair was performed, the foramen ovale was closed and right atrial enlargement with a patch was carried out. Disappearance of the shunt was confirmed by means of transesophageal echocardiography in surgical-room.