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Updated: Mar 19, 2026

Chronic Thromboembolic Pulmonary Hypertension and Assessment of Right Ventricular Function in the Piglet
Published on: November 4, 2015
Double-chambered right ventricle presenting significant outflow tract obstruction only in the right decubitus
Shuji Hayashi1, Hirotsugu Yamada2, Susumu Nishio1
1Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Abstract:
A 75-year-old man was referred to our echocardiography laboratory for presurgical evaluation. His past history included ventricular septal defect closure. He reported chest discomfort in the right decubitus position. Two-dimensional and Doppler echocardiography revealed an anomalous muscle bundle with accelerated blood flow in the right ventricle. The peak flow velocity of the flow increased from 1.4 m/s in the left decubitus position to 2.9 m/s in the right decubitus position. Double-chamber right ventricle with intermittent mid-ventricular obstruction during the right decubitus position was confirmed by transesophageal echocardiography.
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