QUANTITATIVE ESTIMATION OF AORTIC REGURGITATION BY ANALOG COMPUTER ANALYSIS OF RADIOCARDIOGRAM

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概要

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• A new method for the quantitative estimation of aortic regurgitation is reported in this paper. A mathematical model of the transport porcess of a radioisotope in a circulatory system with aortic regurgitation is developed and a simulation circuit of the transport process using analog computer is given. On the mathematical model, the regurgitation at the aortic valve is expressed as a back flow from the aorta with a transport delay equivalent to one cardiac cycle. The rate of regurgitant flow, as given by the ratio of regurgitant flow to the total outflow from the left heart, is determined after curve fitting between an actual radiocardiogram and a theoretical one produced by the simulation circuit for a moderate or large regurgitation, in cases where a definite change appears on the radiocardiogram. It is difficult to determine the rate of regurgitant flow for a small regurgitation of less than 30%. As a result of the simulation study of many radiocardiograms with aortic regurgitation, the following is made clear: (1) Rates of regurgitant flow obtained by the simulation are well correlated to those measured by left ventricular angiography; (2) A linear relationship exists between the computed mean left heart volume and the mean left ventricular volume by angiography; (3) In 31 radiocardiograms with isolated aortic regurgitation, the computed mean left heart volume increases linearly in proportion to the regurgitant volume per beat; (4) Pulmonary blood volume shows a slight but significant increase and it does not show any correlation with the grade of regurgitation; (5) Mean right heart volume does not increase and the ratio of mean right heart volume to mean left heart volume is inversely correlated with the rate of regurgitant flow.

• 社団法人日本循環器学会の論文
• 1974-05-20

著者

• Hara Akira

  First Department Of Internal Medicine. Fukui Medical School

• Hara A

  First Department Of Internal Medicine. Fukui Medical School

• Takayasu Masao

  Cardiovascular(CV) Reseach and Training Center of Alabama Univ. School of Med.

• Takayasu Masao

  The 3rd Dept. of Med. Clinic., Kyoto Univ. Hosp.

• TAKAYASU MASAO

  The National Kyoto Hosp

• OGINO KOICHI

  National Cardiovascular Center, Research Institute

• Hirakawa Akina

  The 3rd Division, Dept. of Internal Medicine, Kyoto University

• Kuwahara Michiyoshi

  Automation Research Laboratory, Kyoto Univ.

• SAITO MUNEYASU

  The 3rd Medical Clinic, Kyoto University Hospital, Kyoto

• MOTOHARA SEIICHIRO

  The 3rd Medical Clinic, Kyoto University Hospital, Kyoto

• OGINO KOICHI

  The 3rd Medical Clinic, Kyoto University Hospital, Kyoto

• Hirakawa Akina

  From The Third Division Department Of Internal Medicine Kyoto University

• Hara A

  Department Of Applied Biological Chemistry Faculty Of Agriculture Meijo University

• Hara Akira

  Shonan Institute Of Technology

• Ogino Koichi

  The 3rd Division Department Of Internal Medicine School Of Medicine Kyoto University

• Takayasu Masao

  The 3rd Medical Clinic Faculty Of Medicine Kyoto University

• Takayasu Masao

  Kyoto Medical Association For Prevention Of Cardiovascular Disease Kyoto National Hospital

• Takayasu Masao

  3rd Div. Dept Of Intern. Med. & 2nd Div. Dept Of Surg. Kyoto Univ. Faculty Of Med.

• Saito Muneyasu

  National Cardiovascular Center Department Of Surgery Medicine

• Takayasu Masao

  3rd Dept. Of Intern. Med. Kyoto Univ.

• Ogino Koichi

  Third Division Department Of Internal Medicine

• Ogino Koichi

  3rd Dept. Of Intern. Med. Kyoto Univ.

• Ogino Koichi

  3rd Division Dept. Of Intern. Med. Kyoto Univ. Sch. Of Med.

• Saito Muneyasu

  The 3rd Div. Dept. Of Intern. Med. Faculty Of Med. Kyoto Univ.

• Saito Muneyasu

  3rd Div. Dept Of Intern Med. Kyoto Univ

• Hara Akira

  From The Third Division Department Of Internal Medicine Kyoto University

• Ogino Koichi

  The 3rd Medical Clinic Kyoto University Hospital Kyoto

• Ogino Koichi

  Maekatva Clinic Kyoto University Hospital

• Hirakawa Akina

  The 3rd Division Dept. Of Internal Medicine Kyoto University

• Motohara Seiichiro

  3rd Div. Dept of Intern Med. Kyoto Univ

• Takayasu Masao

  Department Of Internal. Medicine Kyoto University School Of Medicine

• Hirakawa Akina

  3rd Medical Clinic Faculty Of Medicine Kyoto University

• Takayasu Masao

  Third Dept. Of Intern. Med. Facul. Of Med. Univ. Of Kyoto

• Motomura Shunji

  Department Of Cardiovascular Medicine Shiga Medical Center For Adults

• Kuwahara Michiyoshi

  Automation Research Laboratory Kyoto Univ.

• Takayasu Masao

  3rd Div. Dept. Of Intern. Med. Kyoto Univ. Hosp.

• Ogino Koichi

  3rd Div. Dept. Of Intern. Med. School Of Med. Kyoto Univ.

• Motohara Seiichiro

  Department Od Cardiology Shiga Medical Center For Adults

• Motohara Seiichiro

  The 3rd Division Department Oflnternal Medicine Faculty Ofmedicine Kyoto University

• Takayasu Masao

  3rd Dept. Of Intern. Med. Facul Of Med. Kyoto Univ.

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