Real Time Observation of the Echo Source of Systolic Hump in Hypertrophic Obstructive Cardiomyopathy with High Speed Ultrasono-Cardiotomography

Tadashi KAMBE; Norio HIBI; Kinya NISHIMURA; Toshinori SAKAKIBARA; Tadayuki KATO; Takemi ARAKAWA; Yoichi FUKUI; Arata MIWA; Hisao TADA; Nobuo SAKAMOTO; Kohzo HISANAGA

doi:10.1536/ihj.18.743

Tadashi KAMBE, Norio HIBI, Kinya NISHIMURA, Toshinori SAKAKIBARA, Tadayuki KATO, Takemi ARAKAWA, Yoichi FUKUI, Arata MIWA, Hisao TADA, Nobuo SAKAMOTO, Kohzo HISANAGA

Author information

Tadashi KAMBE
Third Department of Internal Medicine, Nagoya University, School of Medicine
Norio HIBI
Third Department of Internal Medicine, Nagoya University, School of Medicine
Kinya NISHIMURA
Third Department of Internal Medicine, Nagoya University, School of Medicine
Toshinori SAKAKIBARA
Third Department of Internal Medicine, Nagoya University, School of Medicine
Tadayuki KATO
Third Department of Internal Medicine, Nagoya University, School of Medicine
Takemi ARAKAWA
Third Department of Internal Medicine, Nagoya University, School of Medicine
Yoichi FUKUI
Third Department of Internal Medicine, Nagoya University, School of Medicine
Arata MIWA
Third Department of Internal Medicine, Nagoya University, School of Medicine
Hisao TADA
Third Department of Internal Medicine, Nagoya University, School of Medicine
Nobuo SAKAMOTO
Third Department of Internal Medicine, Nagoya University, School of Medicine
Kohzo HISANAGA
Mitsubishi Nagoya Hospital

Keywords: Systolic anterior motion, Idiopathic hypertrophic subaortic stenosis, B-mode echocardiography, M-mode echocardiography, Left heart catheterization

JOURNAL FREE ACCESS

1977 Volume 18 Issue 6 Pages 743-750

DOI https://doi.org/10.1536/ihj.18.743

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Abstract

The present study was undertaken to discuss the echo source of systolic hump in hypertrophic obstructive cardiomyopathy (HOCM) from a viewpoint of B-mode echocardiography. Cross-sectional images were obtained from 4 patients with HOCM using a Sonolayergraph of Toshiba, SSL-51H. This equipment is characterized by its high speed mechanical sector scanning and wider angle.
Recordings were made with ordinary 35mm camera or Polaroid in conjunction with 8mm cinecamera.
Our data showed that systolic hump in this lesion was not caused by anterior systolic movement of anterior mitral leaflet, but was emanated from the chordae tendineae attached to the anterior or posterior mitral leaflet. In systole, the anterior mitral leaflet moved backward for closure, while the chordae tendineae approached the bulged interventricular septum resulting in the formation of systolic hump.

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