JaLCDOI 10.18926/AMO/32059
フルテキストURL fulltext.pdf
著者 Nakagawa, Masahiro| Saito, Daiji| Ueda, Minoru| Yoshida, Hidenori| Mae, Ritsuo| Ioriya, Kazuo| Haraoka, Shoichi|
抄録 <p>Vectorcardiogram (VCG) recorded by both the Frank and Kimura systems were examined in 45 patients with complete right bundle branch block (RBBB) and left axis deviation (LAD) to investigate the relationship seen on electrocardiogram (ECG) between RBBB with LAD and bilateral bundle. The sample included: 13 cases of type SI, SII, SIII, SaVF; 21 cases of type SI, SII, SIII, aVF; and 11 cases of types SI, SII, SIII. VCG recorded by the Frank system were classified into seven types according to the QRS loop pattern on the frontal plane and into three types according to the horizontal plane. The main findings were: (a) In the Frank system the QRS loop in the frontal plane showed a variety of patterns in RBBB with LAD. (b) On VCG of complete RBBB judged complicated by a left anterior hemiblock by the Frank system, the main portion of the QRS loop extended to the left superior or merely to the left in the frontal plane. The direction of rotation and position on the horizontal plane were not consistent. (c) The results of this study suggest the usefulness of the Kimura system as an auxiliary diagnostic technique.</p>
キーワード right bundle branch block left axis deviation bilateral bundle branch block vectorcardiography Frank system Kimura system
Amo Type Article
発行日 1979-10
出版物タイトル Acta Medica Okayama
33巻
5号
出版者 Okayama University Medical School
開始ページ 395
終了ページ 404
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 160186
JaLCDOI 10.18926/AMO/31086
フルテキストURL fulltext.pdf
著者 Haraoka, Shoichi| Saito, Daiji| Ueda, Minoru| Yoshida, Hidenori| Ogino, Yasuhiro| Kusuhara, Shunichi| Yoshioka, Nobuhiko| Miyasaka, Minoru|
抄録 <p>Effects of ischemia and nitroglycerin on systolic time intervals in the segmental myocardial length were studied in anesthetized open-chest dogs. Two strain-gauges were sutured on the surface of the left ventricular wall; one was in the central area perfused by the left circumflex coronary artery (LCX) and the other was in the area perfused by the left anterior descending coronary artery. LCX was partially occluded with a screw type constrictor to the degree at which reactive hyperemia after the transient total coronary occlusion almost disappeared. After the hemodynamics stabilized nitroglycerin (20 microgram/kg) was injected into the femoral vein. In the ischemic area, contraction time was shortened and precontraction time was prolonged in association with an elongation of end-systolic and early systolic segment-length, respectively. The systolic time intervals in the ischemic segment were improved as a result of the recovery in the segment-length toward the control. The results suggest the usefulness of analyzing the segmental myocardial systolic time intervals for verifying the asynchronous contraction of the ventricle and the favourable effects of nitroglycerin on segmental myocardial function in the ischemic area.</p>
キーワード segmental STI nitroglycerin
Amo Type Article
発行日 1978-04
出版物タイトル Acta Medica Okayama
32巻
1号
出版者 Okayama University Medical School
開始ページ 51
終了ページ 59
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 148834
NAID 120002312887
JaLCDOI 10.18926/AMO/31078
フルテキストURL fulltext.pdf
著者 Haraoka, Shoichi| Saito, Daiji| Tawara, Ritsuya| Ueda, Minoru| Yoshida, Hidenori| Ogino, Yasuhiro| Yoshioka, Nobuhiko| Ikenaga, Toyotake|
抄録 <p>Effects of propranolol on ischemic segmental function were studied in anesthetized open-chest dogs. Two segment-length gauges were used for measuring the regional myocardial function: one was sutured on to the left ventricular surface perfused by the anterior descending coronary artery (ischemic zone) and the other was on to that perfused by the circumflex coronary artery (normal zone). A bolus of propranolol (0.5 mg/kg) was injected into the right femoral vein. Five min later, the left anterior descending coronary artery (LAD) was completely occluded for one mine and thereafter released. Then a second coronary occlusion for 20 min was performed; an interval of 20 min was allowed between two occlusions. Propranolol, in the ischemic segment, apparently decreased the extent of paradoxical lengthening in the late systole following one min LAD occlusion, and facilitated improvement of segmental function after release of the occlusion. Moreover, the extent of abnormal stretching induced by 20 min occlusion during early systole, was also reduced by propranolol pretreatment. In contrast, compensatory increase in shortening by the normal segment was disturbed by propranolol. These results suggest that propranolol might exert a favourable influence on the segmental myocardial function during either transient or maintained myocardial ischemia.</p>
キーワード propranolol regional myocardial function ischemia
Amo Type Article
発行日 1978-07
出版物タイトル Acta Medica Okayama
32巻
3号
出版者 Okayama University Medical School
開始ページ 225
終了ページ 237
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 151488
NAID 120002313013
JaLCDOI 10.18926/AMO/31059
フルテキストURL fulltext.pdf
著者 Haraoka, Shoichi| Saito, Daiji| Ueda, Minoru| Ogino, Yasuhiro| Yoshida, Hidenori| Kusuhara, Shunichi| Yoshioka, Nobuhiko| Kawasaki, Tomoko|
抄録 <p>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.</p>
キーワード STI segmental function myocardial ishemia
Amo Type Article
発行日 1978-06
出版物タイトル Acta Medica Okayama
32巻
2号
出版者 Okayama University Medical School
開始ページ 97
終了ページ 107
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 150202
NAID 120002313181
JaLCDOI 10.18926/AMO/30893
フルテキストURL fulltext.pdf
著者 Kusachi, Shozo| Iwasaki, Kohichirou| Nishiyama, Osamu| Ueda, Minoru| Kita, Toshimasa| Hata, Takato| Taniguchi, Gyou| Watanabe, Hirofumi| Hina, Kazuyoshi| Saito, Daiji| Tsuji, Takao| Haraoka, Shoichi|
抄録 <p>We studied the factors which may induce acute high grade restenosis in emergency percutaneous transluminal coronary angioplasty (PTCA). PTCA was attempted in 50 patients with acute myocardial infarction, and the balloon catheter passed successfully across the occlusion site in 47 (94%) of the patients. These 47 patients were analyzed. &#34;Acute restenosis&#34; was defined as a lesion which was revascularized to less than 50% luminal reduction narrowed again to more than 75% luminal reduction 5 min after the balloon inflation. Univariate and multivariate analyses were used for determining factors which significantly influenced acute restenosis. The incidence of at least one restenosis episode was 45%. Multiple regression analysis selected 5 factors associated significantly with an increased rate of acute restenosis: 1) angiographic evidence of dissection, 2) lesion in the right coronary artery (RCA), 3) lack of or insufficient administration of thrombolytic agent preceding PTCA, 4) curved lesion and 5) relatively small balloon/artery diameter ratio. Acute restenosis correlated significantly with late reocclusion. This study indicates that it is important to administer a thrombolytic agent prior to emergency PTCA, and to use an adequately sized balloon to the artery when the acute restenosis occurs by using relatively smaller sized balloon. The present data also demonstrated that patients with RCA and a curved lesion have a relatively high risk of acute restenosis. This study indicates how patients with relatively high risk of acute restenosis may be identified.</p>
キーワード emergency coronary angioplasty restenosis acute myocardial infarction multivariate analysis
Amo Type Article
発行日 1989-02
出版物タイトル Acta Medica Okayama
43巻
1号
出版者 Okayama University Medical School
開始ページ 55
終了ページ 63
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 2524153
Web of Science KeyUT A1989T938500007