Isometric Contraction and Relaxation Times of Right and Left Ventricles in Normal Subjects and in Patients with Right Ventricular Overloading Measured with Bidirectional Echocardiography

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概要

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• With the use of bidirectional echocardiography, the isometric contraction (ICT) and relaxation times (IRT) of both ventricles were measured in 14 normal subjects (N), 6 cases with right ventricular (RV) diastolic overloading (DO), and 5 cases with RV systolic overloading (SO). The RVDO group consisted of patients with atrial septal defect of ostium secundum type who had large left-to-right shunting, and the RVSO group those with pulmonary hypertension of various origins. The mean ICT and IRT in N were 28.5±4.8 and 43.8±1.7msec for RV, and 43.3±5.6 and 60.9±9.0msec for left ventricle (LV), respectively. The RVDO group showed no significant change in the mean ICT and IRT of RV (29.7±4.6 and 54.3±11.8msec, respectively), but significantly greater means of ICT and IRT of LV (58.5±9.5 and 83.6±14.1msec, respectively). In the RVSO group, the mean ICT and IRT were 51.0±4.1 and 86.8±8.2msec for RV, and 72.4±12.2 and 116.0±20.4msec for LV, respectively. These values were all significantly greater than the means for both N and RVDO groups, except that the mean ICT of LV was insignificantly different between the RVDO and RVSO groups. It was noted that the intervals of LV tended to increase with the increasing intervals of RV, suggesting the changes in LV function secondarily due to RV overloading. It was concluded that the measurement of ICT and IRT of both ventricles is of clinical value for evaluation of overall cardiac function in the patients with RV overloading.

• International Heart Journal刊行会の論文

著者

• Kurata Emiko

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• Fujino Takehiko

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• Kanaya Shozo

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• Ito Morio

  Oita Medical College

• Ito Morio

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• Imanishi Sunao

  First Department Of Internal Medicine School Of Medicine Kyushu University And Kurate Kyoritsu Hospi

• Ueno Teruki

  First Dep. of Intern. Med. ,School of Med. ,Kyushu Univ

• Ito Morio

  Department Of Laboratory Medicine School Of Medicine Oita Medical University

• Ito Morio

  First Department Of Internal Medicine Kyushu University Of Medicine

• Yasuda Hideo

  First Department Of Internal Medicine School Of Medicine Kyushu University And Kurate Kyoritsu Hospi

• ITO MORIO

  Kyushu Univ.

• Itoh Morio

  The First Department Of Internal Medicine Faculty Of Medicine Kyushu University

• FUJINO Masanori

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• IMANISHI Sunao

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• ITO Morio

  First Department of Internal Medicine Faculty of Medicine, Kyushu University

• YASUDA Hideo

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• FUJINO Masanori

  First Department of Internal Medicine Faculty of Medicine, Kyushu University

• UENO Teruki

  First Department of Internal Medicine, Faculty of Medicine, Kyushu University

• FUJINO Takehiko

  First Department of Internal Medicine Faculty of Medicine, Kyushu University

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