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Volume 6 (1965)
- Issue 6 Pages 493-
- Issue 5 Pages 387-
- Issue 4 Pages 289-
- Issue 3 Pages 187-
- Issue 2 Pages 101-
- Issue 1 Pages 1-
Volume 6, Issue 2
Displaying 1-9 of 9 articles from this issue
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Tachio KOBAYASHI1965 Volume 6 Issue 2 Pages 101-103
Published: 1965
Released on J-STAGE: December 09, 2008
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Shigeo NAKAKURA, Stanley WEGNER, Clarence M. AGRESS1965 Volume 6 Issue 2 Pages 104-114
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSThe phases of the left heart cycle have been measured in athletes at rest and during exercise utilizing vibrocardiographic and electrocardiographic data. Six periods were studied which corresponded to electromechanical lag, isometric contraction, ejection, isometric relaxation, rapid filling, and diastasis. These periods were compared with the total length of the left heart cycle at heart rates ranging from 50 to 200 beats per min. The range of these intervals was such that the duration of any cardiac phase could be predicted from ventricular cycle length.
The 6 periods of the left heart cycle all diminished linearly with cycle length up to heart rates of 160. After this level, the electromechanical lag and isometric contraction periods remained unchanged, the ejection period short-ened more markedly, and the isometric relaxation and rapid filling periods did not change. The period of diastasis demonstrated a marked shortening and was found to be completely eliminated above heart rates of 160. It was suggested that a physiologic limit of heart rate is achieved near this level.View full abstractDownload PDF (1488K) -
Study and Application of Macroaggregated Albumin (MAA) Lablled with I131 (III)Hideo UEDA, Kenichi KITANI, Haruo KAMEDA, Hideo YAMADA, Masahiro IIO1965 Volume 6 Issue 2 Pages 115-127
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSAfter splenic injection of I131 MAA, its distribution in the liver and lungs was studied by scintiscanning method. Appearance of pulmonary scanning indicates the presence of portal systemic shunts. Three cases with hemolytic anemia, 2 cases having hepatitis and 1 with liver cirrhosis showed no accumula-tion of this material in the lungs. Among 4 cases with liver cirrhosis portal systemic shunts were revealed in 3 by this method. This method was evaluated in contrast with conventional methods such as roentgenologic study of esophageal varices and radioactive rare gas method, and the sensitiveness and usefulness of this new technique was thus suggested.
Hepatic blood flow was measured in 9 patients using radioactive rare gas clearance from the liver. Average blood flow of 3 hemolytic anemias was calculated as 184±3.6 ml./100 Gm. min. by this method. Blood flow values in 2 heptitics and 4 cirrhotics were all markedly reduced compared with those of hemolytic anemias.View full abstractDownload PDF (2520K) -
Shingo AOYAMA, Minoru IWAKAMI1965 Volume 6 Issue 2 Pages 128-143
Published: 1965
Released on J-STAGE: December 09, 2008
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Agustin Jr. CASTELLANOS, Worawit WONGTHONGSRI1965 Volume 6 Issue 2 Pages 144-151
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSFacilitation of A-V nodal and automatic ventricular rhythms by ectopic ventricular contractions was described. In one case only A-V nodal beats were induced, but in the other three, the self-sustained rhythms presented themselves as intermittent parasystole, nodal tachycardia, and automatic ventricular beats. The elicited automatic rhythms were never seen after im-pulses traveling in an orthograde fashion. The term "facilitation" was employed here in reference to disturbances in impulse formation, contrasting with its previous use in connection chiefly to impulse conduction.
The examples presented represent another instance in which an automatic rhythm was precipitated by a coupled (true) extrasystole, thereby emphasizing the relationship between both types of ectopic beats.View full abstractDownload PDF (1999K) -
Tetsuo TSUCHIDA1965 Volume 6 Issue 2 Pages 152-164
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESS(1) The excitability of the myocardium in ischemic region produced by coronary artery ligation were studied on the canine heart through combined use of electric stimulation unit and specially devised multipolar electrode.
(2) The asynchronism of myocardia in recovery from the refractoriness was found in ischemic region. The refractory period observed in the ischemic myocardium became progressively shortened and the diastolic threshold be-came also progressively lowered with increasing ischemia until they reached their minima. After reaching their minima, they started to increase in their values again and finally the myocardium failed to respond even to the extra-ordinary stimulus. These findings were supposed as the cause of asynchronism of myocardia in recovery from the refractoriness.
(3) Markedly low conduction velocity was observed in the early stage of the relative refractory period in ischemic myocardium. The delay of ventricular activation time was also observed in the severely ischemic myo-cardium.
(4) The shorter the interval from the preceding excitation, the shorter was the refractory period.
(5) The threshold for a run of extrasystole and ventricular fibrillation, or the vulnerable threshold, was observed to be low in the ischemic myocard-ium.
(6) The above mentioned findings may account for the frequent occur-rence of ventricular fibrillation on the attack of myocardial infarction. The reason for this was discussed.View full abstractDownload PDF (1137K) -
II. The Effect of CalciumKohji TAMURA1965 Volume 6 Issue 2 Pages 165-173
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSIt was presented that calcium enhanced the atrioventricular dissociation induced by the digitalis to the complete type of it without the ventricular excitation and, in other word, to the ventricular asystole. Therefore, the synergistic effect between calcium and digitalis appeared to prolong the atrioventricular conduction, rather than to enhance the ectopic beat formation.
In this cardiac asystole the myocardium was still excitable to the electrical stimulation and was able to produce the sufficient left ventricular pressure for the general circulation. So the cardiac arrest in this experiment appeared to be due either to the cessation of the activity of a supraventricular pacemaker or to failure of the atrioventricular conduction, rather than to inexcitability of the ventricular myocardium as the effect of potassium to the digitalis intoxication.View full abstractDownload PDF (1101K) -
Kunitake HASHIBA, Tomoyuki KATAYAMA, Akio ONO, Shuzo MATSUO, Yoshimi Y ...1965 Volume 6 Issue 2 Pages 174-182
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSCorrected transposition of the great vessels is almost always associated with other intracardiac anomalies. Patients without associated anomalies are extremely rare.
A 13-year-old boy with corrected transposition of the great vessels without associated intracardiac anomalies is presented and discussed. The characteristic combination of auscultatory, electrocardiographic and roent-genologic features was present.
We are indebted to Dr. L. A. Sagan of the Atomic Bomb Casuality Commission in Nagasaki for correcting the English manuscript.
We wish to thank Prof. Dr. Takaoka for his encouragement.View full abstractDownload PDF (2654K) -
1965 Volume 6 Issue 2 Pages e1
Published: 1965
Released on J-STAGE: December 09, 2008
JOURNAL FREE ACCESSDownload PDF (10K)
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