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Biomedical subjects

T Sumiyoshi

Publications and source records attributed to T Sumiyoshi.

At least 127 records · Page 7Linked to original sources
PubMed1984

New mutants of apolipoprotein E associated with atherosclerotic diseases but not to type III hyperlipoproteinemia.

We analyzed the heterogeneity of apo E in very low density lipoprotein from 58 hyperlipidemic subjects with or without atherosclerosis, 69 patients with ischemic heart disease, and 100 apparently healthy individuals. Apo E gene frequencies in the group of healthy individuals were comparable with those in German and American populations. The distribution of six common apo E phenotypes in the groups of hyperlipidemia and ischemic heart disease was similar to that in the healthy group. In addition to the three major isoforms of apolipoprotein E (apo E-4, E-3, and E-2) and the new one (apo E-5) which was recently found in this laboratory, we have discovered an additional series of components, which showed themselves as at least three bands on an isoelectric focusing gel in the region of E-VII through E-V, in four patients with hyperlipidemia and atherosclerosis. The new series of apo E components, named apo E-Suita, was identical with the ordinary apo E in its interaction with heparin-Sepharose gel and with anti-apo E antibody. The most basic component of apo E-Suita (E-VII) was the unsialylated form and other components (E-VI and E-V), the sialylated forms. Family studies revealed that apo E-Suita was determined by inheritance of a new apo E allele located at the same locus as the hitherto known apo E components. Apo E-5 and apo E-Suita isoproteins had isoelectric points more basic than apo E-3, the parent type, by two and four units of charge, respectively. While the apo E-Suita isoprotein had the same molecular weight as ordinary major apo E isoproteins, the molecular weight of the apo E-5 isoprotein was approximately 1,500-2,000 lower than the other apo E isoproteins by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The incidence of abnormal apo E components, including apo E-5 and apo E-Suita, was high among patients with hyperlipidemia and ischemic heart disease (7:127), while we could not find such components among 100 healthy individuals. Moreover, five of seven patients with the abnormal apo E had overt atherosclerotic disease. The findings suggest that these kinds of apolipoprotein mutation are closely related to the development of atherosclerosis.

Antigen-Antibody Reactions↗
PubMed1984

Usefulness and limitations of vasodilator therapy in the treatment of pump failure complicated by acute myocardial infarction.

The factors associated with the development of pump failure in patients with acute myocardial infarction (MI) were studied in 475 patients admitted to our coronary care unit (CCU) and a clinical and hemodynamic re-evaluation of vasodilator and catecholamine therapy was carried out in patients with pump failure. The severity of pump failure as represented by Killip's classification was closely related to left ventricular (LV) dysfunction as judged by LV ejection fraction, number of previous MIs and peak creatinine phosphokinase (CPK) value, and the severity of coronary atherosclerotic lesions as assessed by coronary arteriography. Retrospective hemodynamic analysis of vasodilator therapy (intravenous nitroglycerin, nitroprusside and phentolamine) in 94 patients with pump failure revealed that a significant decrease in pulmonary capillary wedge pressure (PCW) with no significant change in cardiac index (CI) resulted in a clinical improvement in pulmonary congestion in Forrester's hemodynamic subset 2. However, in patients in subsets 3 and 4, the slight increase in CI induced by vasodilator therapy was not enough to restore normal systemic perfusion in spite of a significant decrease in PCW and total systemic resistance; catecholamine was far more effective in increasing CI. Thus, the major indication for vasodilator therapy is in patients of subset 2, while combined use with catecholamine is preferable in those with low cardiac output.

Aged↗
PubMed1984

Effectiveness and limitation of the current coronary care unit in treatment of patients with complications following acute myocardial infarction.

For an appraisal of effectiveness and limitation of the current coronary care unit (CCU) in treatment of patients with complications following acute myocardial infarction (MI), consecutive 557 patients hospitalized to our CCU during five years were studied. In order to assess the severity of complicating pump failure, patients were divided into four classes according to Killip's classification. Number of patients, total mortality (%) and mortality due to pump failure (%) were as follows; 333 (6%, 2%) in class I, 118 (17%, 8%) in class II, 42 (19%, 17%) in class III and 55 (84%, 80%) in class IV. Warning arrhythmias, cardiac rupture and interventricular septal perforation complicated in 184 patients, 11 and 10, respectively, and mortality due to these complications was 2%, 91% and 84% in the order. Right ventricular infarction complicated in 54 patients, but only one patient died from right heart failure. Post-MI angina manifested in 156 patients and six of them died postoperatively. Our data indicate that improvement in mortality due to pulmonary edema and arrhythmias and reduction in incidence of cardiac rupture are evident effectiveness of the CCU, and that there is no improvement in survival rate of patients with cardiogenic shock even under the use of newly introduced vasodilator and catecholamine therapy or intraaortic balloon pumping.

Angina Pectoris↗
PubMed1984

Effects of isosorbide dinitrate spray on central hemodynamics. Comparison with sublingual glyceryl trinitrate and isosorbide dinitrate.

Effects of isosorbide dinitrate (ISDN) spray (Iso Mack Spray) on central hemodynamics were determined in comparison to sublingual glyceryl trinitrate (nitroglycerin) and ISDN, paying particular attention to their onset and duration of action. In nine patients with uncomplicated acute myocardial infarction, ISDN spray (2 sprays, 2.5 mg) glyceryl trinitrate (TNG, 0.3 mg) and ordinary ISDN tablet (5 mg) were administered by the single-blind crossover method under hemodynamic monitoring with a Swan-Ganz catheter. Systolic pulmonary artery pressure (s-PA), systolic pressure (s-BP) and heart rate were measured every minute for 10 min, every 5 min for the subsequent 20 min and thereafter every 15 to 30 min up to 120 min. Using s-PA as a measure of nitrate action, the onset and duration of action as well as the magnitude of change was compared among the three drugs. ISDN spray had a quick onset of action (2.67 +/- 2.4 min, mean +/- SD) comparable to that of TNG (2.67 +/- 1.00 min), while ISDN spray had a long duration of action (57.4 +/- 42.1 min), which was comparable to that of sublingual ISDN (85.6 +/- 39.5 min, ns) and was significantly longer than that of TNG (11.4 +/- 6.4 min, p less than 0.05). ISDN spray (2.5 mg) showed the same hemodynamic changes as were induced by 0.3 mg TNG or 5 mg ISDN. The results of this study led us to conclude that ISDN spray is a useful agent which induces the abortion of anginal attacks by its quick onset and long duration of action.

Administration, Topical↗
PubMed1984

[Factors influencing the development of low output state in patients with right ventricular infarction].

Right ventricular infarction is frequently accompanied by a low output state, but the factors influencing the development of this state remain unknown. To elucidate these factors, clinical findings, hemodynamic findings and left ventricular infarct size (T1-score) calculated from thallium-201 myocardial scintigrams by a circumferential profile method were evaluated in 147 consecutive patients with acute transmural inferior myocardial infarction. They were divided into two groups: 44 patients with right ventricular involvement (RVI group) and 103 patients without right ventricular involvement (IMI group). A low cardiac output state was defined when the cardiac index was less than 2.2 L/min/M2. There was a good correlation between T1-score and any of peak value of serum creatine phosphokinase (CPKmax), total released CPK (CPKr) and left ventricular ejection fraction (LVEF) (r = 0.66, 0.74 and -0.54, respectively), indicating the usefulness of T1-score as an index of left ventricular damage. Compared to the IMI group, the RVI group showed a higher average of age (p less than 0.01), lower systemic blood pressure (p less than 0.01), higher right atrial pressure (p less than 0.001) and lower cardiac index (p less than 0.01). Furthermore, the incidence of a low output state (RVI group : 47.7% vs IMI group : 14.6%, p less than 0.001) and mortality (25.0% vs 7.8%, p less than 0.01) were higher in the RVI group. However, CPKmax, CPKr, LVEF and T1-score, which were considered to reflect the severity of left ventricular damage, were not different between the two groups. T1-score was inversely correlated with cardiac index in the RVI group (r = -0.49, p less than 0.05), and with left ventricular stroke work index in the both groups (RVI group; r = -0.46, p less than 0.01, IMI group; r = -0.64, p less than 0.01). Additionally, age as well as heart rate was correlated significantly with cardiac index (r = -0.45, p less than 0.001 and r = 0.35, p less than 0.001, respectively), and the percentage of elderly patients (age greater than 60 years) and the incidence of bradycardia (heart rate less than 60/min) were both higher in the RVI group than the IMI group (either p less than 0.05).(ABSTRACT TRUNCATED AT 400 WORDS)

Age Factors↗
PubMed1978

Rapid, sensitive detection of myoglobulinemia by improved counterimmunoelectrophoresis in cases of acute myocardial infarction.

A counterimmunoelectrophoresis technique for detection of serum myoglobin (Mb) was improved using non-ionic polymer dextran. Precipitin lines were graded according to their strength, which was ascertained by radioimmunoassay data. By this method, serum Mb in concentrations of 500 ng./ml. before stain and of 200 ng./ml. after stain were detected. Electrophoretic time was 60 minutes. Among 32 cases of acute myocardial infarction (AMI) whose blood samples were collected within 24 hours after disease onset, precipitin lines were detected in 25 cases (78%) before stain and 31 cases (97%) after stain. Considering the early peak concentration time (approximately 10 hours) of serum Mb after AMI onset, diagnosis becomes more rapid and exact with this method, especially in severe cases.

Acute Disease↗