1. 1. Rodrigues P, Palma P, Sousa-Pereira L. Platypnea-orthodeoxia syndrome in review: defining a new disease? Cardiology 123: 15-23, 2012.
2. 2. Cheng TO. Platypnea-orthodeoxia syndrome: etiology, differential diagnosis, and management. Catheter Cardiovasc Interv 47: 64-66, 1999.
3. 3. Knapper JT, Schultz J, Das G, Sperling LS. Cardiac platypnea-orthodeoxia syndrome: an often unrecognized malady. Clin Cardiol 37: 645-649, 2014.
4. 4. Takaya Y, Akagi T, Kijima Y, et al. Transcatheter closure of right-to-left atrial shunt in patients with platypnea-orthodeoxia syndrome associated with aortic elongation. Cardiovasc Interv Ther 29: 221-225, 2014.
5. 5. Shiraishi Y, Hakuno D, Isoda K, Miyazaki K, Adachi T. Platypnea-orthodeoxia syndrome due to PFO and aortic dilation. JACC Cardiovasc Imaging 5: 570-571, 2012.