[A strange case of acute respiratory failure: the platypnea-orthodeoxia syndrome].

Platypnea-orthodeoxia syndrome is a rare disorder characterized by dyspnea and oxygen desaturation in upright position, with improvement of symptoms and blood oxygenation in supine position. Basically a right-to-left shunt (intracardiac or pulmonary) or a ventilation/perfusion mismatch are necessary to develop platypnea-orthodeoxia syndrome. Atrial septal defects, including patent foramen ovale (PFO), are known to be a frequent cause of platypnea-orthodeoxia syndrome.

Simple versus complex approaches to treating coronary bifurcation lesions: direct assessment of stent strut apposition by optical coherence tomography.

Introduction And Objectives: Stenting of coronary bifurcation lesions carries an increased risk of stent deformation and malapposition. Anatomical and pathological observations indicate that the high stent thrombosis rate in bifurcations is due to malapposition of stent struts.

Methods: Strut apposition was assessed with optical coherence tomography (OCT) in bifurcation lesions treated either using the simple technique of stent implantation in the main vessel only or a complex technique (i.