Permanent Right-to-Left Shunt Is the Key Factor in Managing Patent Foramen Ovale

Provoked right-to-left shunt in patent foramen ovale associates with ischemic stroke in posterior circulation.

BACKGROUND AND PURPOSE Right-to-left shunt (RLS) via the patent foramen ovale is an important cause of cryptogenic stroke. The Valsalva maneuver provokes or enhances RLS, but RLS can also occur during normal respiration. This study examined whether the ischemic lesion pattern differs depending on the character of RLS. METHODS All consecutive patients with a patent foramen ovale (diagnosed by ...

Eliminating right-to-left shunt with patent foramen ovale closure: not as simple as it seems.

Cryptogenic stroke with right-to-left shunt and no patent foramen ovale.

MOTS CLÉS Fistule A 59-year-old healthy woman had a cryptogenic stroke that, based on visualization of a significant shunt on transoesophageal echocardiography with contrast bubbles appearing in the left atrium at three beats after filling of the right atrium, was attributed to PFO. However, percutaneous closure of the PFO under local anaesthesia and fluoroscopic guidance failed because no intr...

Patent foramen ovale with right to left shunt as a cause of hypoxia.

Patent foramen ovale with right to left shunt as a cause of hypoxia without Eisenmengers physiology or with only moderately pulmonary artery pressures is an uncommon presentation. Initial diagnosis via transesophageal echocardiography requires detection of a shunt with either color Doppler or agitated saline contrast with or without Valsalva maneuver. This rare but diagnosable case presented wa...

[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 clos...