ID | 31059 |
JaLCDOI | |
FullText URL | |
Author |
Haraoka, Shoichi
Saito, Daiji
Ueda, Minoru
Ogino, Yasuhiro
Yoshida, Hidenori
Kusuhara, Shunichi
Yoshioka, Nobuhiko
Kawasaki, Tomoko
|
Abstract | The correlation between the systolic time interval and abnormal contraction in ischemic myocardium was studied in anesthetized open-chest dogs. A strain-gauge was sutured on the surface of the left ventricular wall perfused by the left anterior descending coronary artery (LAD) for measuring segment-length. The left ventricular stroke volume decreased progressively after occlusion of LAD. The left ventricular ejection time (LVET) was progressively shortened in close correlation with the elongation of segment-length at the onset of isometric relaxation in 20 seconds after LAD occlusion when early systolic myocardial contraction and isometric contraction time (ICT) were not affected. ICT was gradually prolonged and closely related with the lengthening of the early systolic segment-length, while LVET recovered toward the control level in spite of further decrease in stroke volume. A close relationship was observed between ICT/LVET and stroke volume (gamma = 0.76, P less than 0.01). The results suggested the possibility that LVET was normalized even when the left ventricular function was impaired, and ICT/LVET ratio was the most sensitive index of LV dysfunction. |
Keywords | STI
segmental function
myocardial ishemia
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Amo Type | Article
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Publication Title |
Acta Medica Okayama
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Published Date | 1978-06
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Volume | volume32
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Issue | issue2
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Publisher | Okayama University Medical School
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Start Page | 97
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End Page | 107
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ISSN | 0386-300X
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NCID | AA00508441
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Content Type |
Journal Article
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language |
English
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File Version | publisher
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Refereed |
True
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PubMed ID | |
NAID |