Relation between Myocardial Contractility and Stiffness in Clinical Cases
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- TOMODA Haruo
- Department of Cardiology, School of Medicine Tokai University
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- MATSUMOTO Sadatoshi
- Department of Cardiology, School of Medicine Tokai University
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- SASAMOTO Hiroshi
- Department of Cardiology, School of Medicine Tokai University
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- KOIDE Shirosaku
- Department of Cardiovascular Surgery, School of Medicine Tokai University
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- KAWADA Shimei
- Department of Cardiovascular Surgery, School of Medicine Tokai University
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- SHOTSU Akira
- Department of Cardiovascular Surgery, School of Medicine Tokai University
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- KURIBAYASHI Sachio
- Department of Radiology, School of Medicine Tokai University
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- MATSUYAMA Seiya
- Department of Radiology, School of Medicine Tokai University
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説明
Left ventricular myocardial stiffness was evaluated in 50 patients who underwent cardiac catheterization. Left ventricular cineangiograms and simultaneously recorded left ventriculr pressure tracings were analyzed. The left ventricular stiffness constant k was computed by substituting the left ventricular myocardial stress (σ) and strain (ε) throughout the period between the end of rapid filling and the beginning of atrial contraction in the equation σ=b・e^<κ・ε>. Left ventricular myocardial stiffness constants were measured as follows: Group I (normal, 9)-10.0±3.8, Group II (mitral stenosis, 8)-10.4±3.4, Group III (left ventricular volume overload, 11)-11.7±3.4, Group IV (coronary artery disease without myocardial infarction, 10)-8.9±2.2, and Group V (myocardial infarction, 12)-20.1±7.9. All of the normal cases showed stiffness constants of less than 15 and maxVcf of more than 2.0 circ./sec., and all of the patients with heart failure in Groups III-V showed stiffness constants of more than 15 and maxVcf of less than 1.0 circ./sec. Thirteen patients who had surgical indications and who also did not have increased myocardial stiffness (k less than 15) with or without abnormal values of contractility indices underwent corrective cardiac surgery with satisfactory results and normal morphological findings in myocardium. Thus, assessment of left ventricular myocardial stiffness offers useful additional information concerning cardiac status in clinical cases.
収録刊行物
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- Tokai journal of experimental and clinical medicine
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Tokai journal of experimental and clinical medicine 3 (4), 231-239, 1978-10
東海大学
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詳細情報 詳細情報について
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- CRID
- 1571980076879232384
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- NII論文ID
- 110004690463
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- NII書誌ID
- AA00863975
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- ISSN
- 03850005
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles