Double-chambered right ventricle presenting significant outflow tract obstruction only in the right decubitus position.
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.
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Shuji
S
Hayashi
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan. yamadah@clin.med.tokushima-u.ac.jp.
Hirotsugu
H
Yamada
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Susumu
S
Nishio
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Noriko
N
Tomita
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Junko
J
Hotchi
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Mika
M
Bando
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Maya
M
Nakagawa
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Rina
R
Tamai
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Daichi
D
Hirota
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Yukina
Y
Hirata
Ultrasound Examination Center, Tokushima University Hospital, 2-50-1 Kuramoto, Tokushima, 770-8503, Japan.
Masataka
M
Sata
Doppler echocardiography; Double-chambered right ventricle; Postural change; Right mid-ventricular obstruction; Ventricular septal defect