巻号一覧
44 巻, 3 号
選択された号の論文の8件中1～8を表示しています
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YASUMI UCHIDA, NOBUO YOSHIMOTO, SATORU MURAO1980 年 44 巻 3 号 p. 163-171
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーMorphological changes associated with cyclical reductions of blood pressure in the partially constricted coronary artery of anesthetized dogs have been examined. In the constricted coronary segments, smooth and diffuse spasm, rosary-like spasm, a localized narrowing indicating a platelet aggregate or thrombus, and no obvious change were observed during the pressure reductions in 3, 5, 2 and 5 of 15 trials of 12 preparations, respectively. In the distal segments of the same preparations, segmental spasm and diffuse spasm were observed during the pressure reductions in 8 and one trials, respectively. The changes in the constricted and distal segments appeared simultaneously or independently. The change which indicates obstruction of the distal segments with platelet aggregates or thrombi was observed in none. The results indicate that spasm, but not platelet aggregates or thrombi, in the constricted segments and/or distal segments plays the major role in the cyclical reductions of blood pressure in the partially constricted coronary artery .抄録全体を表示PDF形式でダウンロード (1204K) -
HIROSHI SHIDA, MIYOHARU KOBAYASHI1980 年 44 巻 3 号 p. 172-178
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーThe effect of hypothermic ischemic arrest on myocardial contractility was investigated with use of isolated blood-perfused canine heart preparation in the hypertrophied left ventricle created by supravalvular aortic stenosis and the nonhypertrophied ventricle. The following results were obtained : The percent recovery rate of net developed tension during reperfusion after an ischemic period of 150 minutes at the myocardial temperature of 17°C was 90±9% in the nonhypertrophied muscle, while it was 70±19% in the hypertrophied muscle, that is, hypertrophied left ventricle was considered to be more vulnerable to ischemia as compared to nonhypertrophied left ventricle, suggesting the necessity of more intense myocardial protection in addition to cardiac hypothermia against ischemia in the hypertrophied heart.抄録全体を表示PDF形式でダウンロード (774K) -
YUTAKA KIKUCHI, HITONOBU TOMOIKE1980 年 44 巻 3 号 p. 181-184
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーWhen a large left ventricular aneurysm or infarct is excised, a frequent complication is inability of the left ventricle to regain adequate performance. Reduction in ventricular volume and impairment of myocardial contractility, either of which can diminish cardiac output to levels incompatible with life, are probably the main factors that lead to left ventricular failure after such surgery. A prototype prosthetic myocardium, designed to mimic the actions of the left ventricular myocardium, offers a direct means of restoring both ventricular volume and contractility after excision of a large portion of the left ventricle. In dog experiments 17 ± 1.1 % (AV ± SE) of the left ventricle was infarcted and excised under cardiopulmonary bypass. The prosthetic myocardium was implanted and activated, and changes in hemodynamic parameters produced by the assist device were studied. "On" to "off" changes in 11 dogs in congestive failure averaged over the course of the experiment were as follows : m-AoP was increased 19 ± 1.7% (Mean ± SE) : LV Syst. Press. was increased 24 ± 1.7% ; SV was increased 34 ± 3.2%, LVEDP and m-LAP were reduced 43 ± 2.4% and 22 ± 1.4% respectively ; and LVSW increased 88 ± 8.8%. With these hemodynamic benefits this prototype represents an encouraging step toward the development of a device for orthotopic replacement of damaged myocardium.抄録全体を表示PDF形式でダウンロード (601K) -
YOSHIO YAZAKI, RYOZO NAGAI1980 年 44 巻 3 号 p. 185-187
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーMorphological changes associated with cyclical reductions of blood pressure in the partially constricted coronary artery of anesthetized dogs have been examined. In the constricted coronary segments, smooth and diffuse spasm, rosary-like spasm, a localized narrowing indicating a platelet aggregate or thrombus, and no obvious change were observed during the pressure reductions in 3, 5, 2 and 5 of 15 trials of 12 preparations, respectively. In the distal segments of the same preparations, segmental spasm and diffuse spasm were observed during the pressure reductions in 8 and one trials, respectively. The changes in the constricted and distal segments appeared simultaneously or independently. The change which indicates obstruction of the distal segments with platelet aggregates or thrombi was observed in none. The results indicate that spasm, but not platelet aggregates or thrombi, in the constricted segments and/or distal segments plays the major role in the cyclical reductions of blood pressure in the partially constricted coronary artery .抄録全体を表示PDF形式でダウンロード (396K) -
TETSUO MIZUTANI, MITSUHIRO YOKOYAMA1980 年 44 巻 3 号 p. 188-196
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーThe effect of hypothermic ischemic arrest on myocardial contractility was investigated with use of isolated blood-perfused canine heart preparation in the hypertrophied left ventricle created by supravalvular aortic stenosis and the nonhypertrophied ventricle. The following results were obtained : The percent recovery rate of net developed tension during reperfusion after an ischemic period of 150 minutes at the myocardial temperature of 17°C was 90±9% in the nonhypertrophied muscle, while it was 70±19% in the hypertrophied muscle, that is, hypertrophied left ventricle was considered to be more vulnerable to ischemia as compared to nonhypertrophied left ventricle, suggesting the necessity of more intense myocardial protection in addition to cardiac hypothermia against ischemia in the hypertrophied heart.抄録全体を表示PDF形式でダウンロード (824K) -
HIROSHI HAYASHI, YOSHIHIKO WATANABE, TOMIHISA ISHIKAWA, MASATOSHI WADA ...1980 年 44 巻 3 号 p. 197-208
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーThe diagnosis of the location and size of old myocardial infarction was made by the map and various indices obtained from the map were correlated with coronary arteriography, left ventriculography, and 201T1 myocardial scintigraphy. Diseased coronary arteries were presumed from Q30, Q40 area and/or peak voltage map and left ventricular wall motion was estimated from subtraction map. There were significant correlations between ejection fraction and ΣR in anterolateral MI (r = 0.51, p < 0.001) and between ejection fraction and nQ30 in anterolateral (r = -0.47, p < 0.001) and inferoposterior (r = -0.63, p < 0.01) MI. Negative correlation was observed between myocardial uptake ratio (MUR) and nQ30 (r = -0.69, p < 0.001) and positive correlation between MUR and ΣR (r = 0.50, p < 0.01) in anterolateral MI. Those cases which could not be diagnosed by either ECG or 201T1 scintigraphy were correctly diagnosed by the map and it proved to have an excellent diagnostic accuracy for myocardial infraction.抄録全体を表示PDF形式でダウンロード (992K) -
TAKESHI KOBAYASHI, ATSUSHI MIYAMOTO, JOUJI ANDO, MASAYORI FURUDATE, HI ...1980 年 44 巻 3 号 p. 209-217
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーPDF形式でダウンロード (713K) -
SHIN-ICHI KIMATA, YASUO INOUE1980 年 44 巻 3 号 p. 218-234
発行日: 1980/04/20
公開日: 2008/04/14
ジャーナル フリーPDF形式でダウンロード (1217K)
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