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- Yuki Hasegawa, Daisuke Izumi, Yasuhiro Ikami, Takeshi Okubo, Makoto Hoyano, Kazuyuki Ozaki, Noriaki Sato, Takehito Mishima, and Takayuki Inomata.
- Department of Cardiovascular Medicine, Niigata University Graduate School of Medical and Dental Sciences, Japan.
- Intern. Med. 2022 Aug 1; 61 (15): 2315-2317.
AbstractAn 84-year-old woman presented with dyspnea in the sitting position. Platypnea-orthodeoxia syndrome (POS) was suspected based on arterial desaturation when her posture changed from the supine to the sitting position. Transesophageal echocardiography showed right-to-left shunting enhancement through a patent foramen ovale (PFO) in the sitting position. Three-dimensional (3D) cardiac CT in the sitting position revealed that the elongated ascending aorta compressed the right ventricular inflow tract, resulting in restricted blood flow to the right ventricle and increased right-to-left shunting. This case highlights the role of 3D-CT in the sitting position in the management of POS.
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