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Biomedical subjects

S Bando

Publications and source records attributed to S Bando.

At least 55 records · Page 3Linked to original sources
PubMed1985

Aging changes of riboflavin concentration and glutathione reductase activity in erythrocytes.

Aged erythrocytes obtained by fractionation using gradient centrifugation with Dextran 40, showed lower glutathione reductase activity and riboflavin content than young cells. However, both young and old cells displayed almost the same increase in enzyme activity upon addition of flavin adenine dinucleotide to the test hemolysate in vitro. The lipid peroxide content in the cell membranes showed no consistent changes with aging.

Centrifugation, Density Gradient↗
PubMed1983

[Mode of production of the splitting of the second heart sound in post-extrasystolic beats].

The changes in left and right ventricular systolic time intervals (LV- and RVSTIs) and split interval of the second heart sound (IIA-IIP interval) associated with post-extrasystolic potentiation were studied in 48 patients including 37 without a significant intracardiac shunt or valvular regurgitation or pulmonary hypertension, 7 with aortic stenosis (AS) and 4 with hypertrophic obstructive cardiomyopathy (HOCM). In 19 out of 37 patients mentioned above, LV- and RVSTIs were measured from carotid pulse and pulmonary arterial pulse waves, and IIA-IIP interval of post-extrasystolic beat with a compensatory pause was compared to that of the preceding sinus beat. In the other 29 patients including AS and HOCM, LVSTI, total electromechanical systole of the right ventricle (Q-IIP) and IIA-IIP interval were compared. There was no significant difference in the coupling index [(compensatory pause-coupling interval)/preceding RR interval X 100(%)] among three groups. The following results were obtained: In all patients without HOCM, post-extrasystolic beats showed wider IIA-IIP interval than the control beats independent upon the diseased entity and severity of cardiac function. In pts with HOCM, a IIA-IIP interval was shortened in post-extrasystolic beats. A IIA-IIP interval at post-extrasystolic beats was prolonged in proportion to the augmentation of coupling index. However, this finding was no longer observed in cases with the coupling index of more than 80%. LVSTI: In patients without HOCM, almost no change or prolongation of left ventricular ejection time (LVET) and shortening of left ventricular preejection period (LPEP) were observed in post-extrasystolic beats. The degree of changes in LVET and LPEP was greater in patients with the abnormal left-sided PEP/ET than in patients with the normal PEP/ET. The degree of changes in LPEP was always greater than that in LVET, therefore, total electromechanical systole of the left ventricle (Q-IIA) was shortened in all patients. In HOCM, a marked prolongation of LVET and a shortening of LPEP were observed. The degree of changes in LVET was greater than that in LPEP, therefore, Q-IIA was prolonged in all patients. RVSTI: Prolongation of right ventricular ejection time (RVET) and shortening of right ventricular preejection period (RPEP) were observed in all patients in post-extrasystolic beats. The degree of changes in RVET and RPEP was increased in patients with the increased right-sided PEP/ET. The degree of changes in RVET was greater than or equal to that in LPEP, therefore, Q-IIP showed slight prolongation or no change.(ABSTRACT TRUNCATED AT 400 WORDS)

Animals↗
PubMed1982

[Echocardiographic study on systolic left ventricular posterior wall motion in patient with atrial septal defect].

Systolic motion of the left ventricular posterior wall (LVPW) was studied by M-mode and long-axis two-dimensional echocardiography in 35 patients (pts) with secundum type of atrial septal defect (ASD), comparing with that of 19 surgically closed ASD (post ASD), 27 with hypertrophic cardiomyopathy (HCM), 15 with old anteroseptal myocardial infarction (a-s MI) and 28 normal subjects. The results obtained were as follows: 1) Excursion of LVPW (PWE) was significantly increased in the pts with ASD compared with normal subjects (P less than 0.001), but there was no significant difference in PWE between the pts with ASD and the pts with HCM or a-s MI. 2) Mean systolic posterior wall velocity (MPWVs) was significantly decreased in the pts with ASD compared with the pts with HCM (p less than 0.05). However, no significant difference could be found in MPWVs between the pts with ASD and a-s MI or normal subjects. 3) End-systolic thickening of LVPW was significantly increased in the pts with ASD compared with normal subjects (p less than 0.05), the pts with a-s MI (p less than 0.05) and the pts with post ASD (p less than 0.01), except for the pts with HCM. There was a significant difference in % end-systolic thickness of lVPW between the pts with ASD and the pts with a-s MI or post ASD (p less than 0:05). 4) Mid-systolic thickening and % mid-systolic thickening of LVPW were significantly increased in the pts with ASD compared with normal subjects, the pts with a-s MI, the pts with post ASD and the pts with HCM (p less than 0.01). This characteristic mid-systolic bulging of LVPW in the pts with ASD was coincident with early-systolic anterior motion of IVS. 5) Basal portion of LVPW indicated the marked inward contraction during end-systole in 30 of 35 pts (86%) with ASD. In these 30 pts, association of mitral valve (MV) prolapse was observed. 6) Following surgical closure of ASD in 19 pts, MV prolapse disappeared following normalization of excessive endsystolic contraction of the LVPW in 16 pts (functional MV prolapse). In 3 pts, however, posterior MV showed multiple abnormal echoes, indicating MV prolapse or mitral regurgitation (organic MV prolapse). In conclusion, these results suggested that mid-systolic bulging of LVPW in ASD is compensatory reaction for systolic anterior IVS motion, and that mechanism of MV prolapse in ASD is related to abnormal left ventricular geometry due to excessive inward contraction of basal portion of LVPW during end-systole.

Adult↗
PubMed1981

The structure of cytochrome c3 from Desulfovibrio vulgaris Miyazaki at 2.5 A resolution.

The structure of tetraheme cytochrome c3 isolated from Desulfovibrio vulgaris Miyazaki has been determined at 2.5 A resolution by an X-ray diffraction method. Protein phases were computed by the multiple isomorphous replacement method using the native and four heavy atom derivatives, anomalous scattering measurements of the latter being considered. The mean figure of merit was 0.77. Four heme groups are exposed on the surface of the molecule. There are some short helical segments in the polypeptide chain, and hair-pin turns are often observed at glycine and alanine residues.

Amino Acid Sequence↗
PubMed1981

Spatial electrocardiography.

Spatial electrocardiography can express the spatial characteristics of electromotive forces of the heart quantiatively. The pattern of the sequential changes of these spatial characteristics of the cardiac vectors also provides important diagnostic informations. Accordingly, spatial electrocardiography is considered to be useful in clinical cardiology in association with conventional electrocardiography and vectorcardiography.

Humans↗