Transient right-to-left shunting through a patent foramen ovale secondary to unilateral diaphragmatic paralysis

Abstract

A 57 year old patient presented with unilateral diaphragmatic paralysis and severe hypoxaemia secondary to transient rightto- left interatrial shunting through a patent foramen ovale. The final diagnosis was made because of the initial detection of a shunt while the patient was breathing 100% oxygen.