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Biomedical subjects

K Miyachi

Publications and source records attributed to K Miyachi.

54 records · Page 3Linked to original sources
PubMed1985

[Ventricular activation sequence estimated by body surface isochrone map].

This study was performed to evaluate the usefulness of the body surface isochrone map (VAT map) for identifying the ventricular activation sequence, and it was correlated with the isopotential map. Subjects consisted of 42 normal healthy adults, 18 patients with artificial ventricular pacemakers, and 100 patients with ventricular premature beats (VPB). The sites of pacemaker implantations were the right ventricular endocardial apex (nine cases), right ventricular epicardial apex (five cases), right ventricular inflow tract (one case), left ventricular epicardial apex (one case), and posterior base of the left ventricle via the coronary sinus (two cases). An isopotential map was recorded by the mapper HPM-6500 (Chunichi-Denshi Co.) on the basis of an 87 unipolar lead ECG, and a VAT isochrone map was drawn by a minicomputer. The normal VAT map was classified by type according to alignment of isochrone lines, and their frequency was 57.1% for type A, 16.7% for type B, and 26.2% for type C. In the VAT map of ventricular pacing, the body surface area of initial isochrone lines represented well the sites of pacemaker stimuli. In the VAT map of VPB, the sites of origin of VPB agreed well with those as determined by the previous study using an isopotential map. The density of the isochrone lines suggested the mode of conduction via the specialized conduction system or ventricular muscle. The VAT map is a very useful diagnostic method to predict the ventricular activation sequence more directly in a single sheet of the map.

Bundle-Branch Block↗
PubMed1985

[Quantitative evaluation of various cardiac diseases using body surface mapping].

Body surface mapping (map) was used to evaluate various cardiac diseases quantitatively. For 30 cases with old anterior myocardial infarction (AMI), map parameters were compared with infarct size assessed by left ventriculography and 201Tl myocardial scintigraphy (LV% asynergy and 201Tl% defect, respectively). Parameters used in the present study were nSubtraction 40 (sigma Subtr. 40), which were obtained by the summation of voltages less than the lower limit of normal range (mean--2SD) at 40 msec from the QRS onset and nSubtraction 10-60 (sigma Subtr. 10-60), which was obtained by the integral of voltages below the normal range, calculated each 10 msec to 60 msec, as well as the number of lead points with Q waves of 30, 40 msec duration (nQ30, nQ40), and the summation of R voltages over the entire body surface (sigma R). In 19 cases with aortic regurgitation (AR), R and S voltages in each lead were compared with left ventricular diastolic dimension (LVDd) obtained by echocardiography. In 43 healthy persons and two patients with RV pacing, the ventricular activation time was measured in each lead (VAT map). In AMI, nSubtr. 40 correlated best with LV% asynergy (r = 0.70, p less than 0.001). EF and 201Tl% defect were related to nSubtr. 10-60 (r = 0.83, p less than 0.001 and r = 0.85, p less than 0.001, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1984

Precipitating antimitochondrial antibodies in Japanese patients with primary biliary cirrhosis.

The prevalence of three precipitating antibodies to mitochondria A (M-A), mitochondria B (M-B), and mitochondria C (M-C), reacting with the antigens in the mitochondrial fraction of sonicated rat liver was studied in Japanese patients with primary biliary cirrhosis and other liver diseases. Antibodies to M-A and M-B were found in 12 of 22 (54%) and 11 of 22 (50%) patients, respectively. Antibodies to M-C were found in only one of 22 (4%) patients. The titers of antibodies to M-A and M-B correlated with the titers of mitochondrial immunofluorescence staining on unfixed mouse kidney section (r = 0.71 and 0.81, respectively). These antibodies were not present in liver cirrhosis (20 patients), chronic active hepatitis (20), acute viral hepatitis (10), and hepatoma (10). However, the titers of these antibodies did not correlate with amount of immunoglobulin, immune complexes, and the severity of disease. This work confirms that the antibodies to M-A and M-B are also marker antibodies for Japanese patients with primary biliary cirrhosis.

Adult↗
PubMed1983

Sialographic study in patients with and without antibodies to Sjögren's syndrome A (Ro).

Antibodies to Sjögren's syndrome A (SS-A) (Ro) antigen were detected in 13 of 16 (81%) patients with sicca alone and 18 of 34 (54%) patients with systemic lupus erythematosus (SLE). Antibodies to Sjögren's syndrome B (SS-B) (La, Ha) antigen were detected in 7 of 16 (44%) patients with sicca alone. These percentages were statistically higher than those in other types of connective tissue diseases. There were no direct correlations between titers of antibodies to SS-A (Ro) and severity of sialographic abnormalities in 35 patients with Sjögren's syndrome (SS). However comparison of a total of 20 sialograms obtained from patients with antibodies to SS-A (Ro) showed more advanced changes than in a total of 36 sialograms from patients without antibodies to SS-A (Ro) in systemic lupus erythematosus, mixed connective tissue disease, progressive systemic sclerosis and rheumatoid arthritis. These results suggested that antibody to SS-A (Ro) may be a good indicator of subclinical SS.

Adult↗
PubMed1983

[Clinical evaluation of an ampicillin suppository (KS-R1) in infections in children].

The following results were obtained in clinical trials of new ampicillin suppository (KS-R1) in the pediatric infection. Twenty-four patients comprising 15 with respiratory tract infection, 9 with urinary tract infection were received KS-R1 at the dose ranging from 31 mg/kg to 75 mg/kg divided 3 or 4 times a day. The results in the respiratory tract infection were "excellent" in 8 and "good" in 6, and the efficacy rate was 93.3%. The results in the urinary tract infection were "excellent" in 4 and "good" in 3, and the efficacy rate was 77.8%. Diarrhea were observed in 4 patients, and anal pain was observed in 1. But the symptoms were transient. No abnormal laboratory findings were observed.

Age Factors↗
PubMed1980

Preciitating antibodies to mitochondrial antigens in patients with primary biliary cirrhosis.

Sera of patients with primary biliary cirrhosis (PBC) were examined for the presence of precipitating antibodies to sonicated rat liver mitochondrial (M) fraction. Three distinct precipitating systems observed in double immunodiffusion were identified and called M-A, M-B and M-C. Unsonicated mitochondria did not form precipitin lines. Precipitating system M-A was found in nineteen of twenty (95 percent) sera from PBC. The mitochondrial antigen of M-A system had the unusual property of being resistant to enzymatic digestion with deoxyribonuclease (DNase), ribonuclease (RNase) and trypsin under standard conditions. The titres of antibody to M-A antigen correlated (P less than 0.05) with titres of mitochondrial immunofluorescence staining on unfixed mouse kidney sections. Precipitating systems M-B and M-C were present in seven of twenty ribonuclease and trypsin but resistant to ribonuclease indicating that it could be DNA-protein complex. The M-C antigen was destroyed by trypsin suggesting its protein character, but it was difficult to determine if nucleic acids might also be associated with antigenicity. The antibodies to mitochondrial antigens were not present in normals (fifteen health adults), systemic lupus erythematosus (forty patients), rheumatoid arthritis (fifteen patients) and chronic liver diseases (fifteen patients). The antibodies did not show identity with antibodies to ribosomal ribonucleo-protein and other known nuclear antigens previously reported. The data confirm previous reports concerning the heterogeneity of mitochondrial antibodies present in sera of patients with PBC. The antibody to M-A antigen appeared to be a diagnostically useful immunological marker since it was present in the majority of patients with PBC.

Adult↗
PubMed1979

Antibodies reacting with ribosomal ribonucleoprotein in connective tissue diseases.

Precipitating antibody to an antigen present in cytoplasm was detected in the sera of 7 patients with systemic lupus erythematosus, 1 patient with an overlap toid arthritis, and 1 patient with mixed connective tissue disease. By physicochemical and enzymatic studies, the antigen was shown to have the properties of ribosomal ribonucleoprotein (gamma-RNP). Cytoplasmic staining in immunofluorescence was observed with all the 9 sera containing antibodies to gamma-RNP. In certain cases, cytoplasmic staining was associated with nucleolar staining. Antibody to gamma-RNP is different in immunologic specificity and clinical significance from antibody to nuclear RNP and is present primarily in patients with systemic lupus erythematosus.

Arthritis, Rheumatoid↗
PubMed1976

Morphological and biochemical studies of a case of mucopolysaccharidosis II (Hunter's syndrome).

An autopsy case of a 19-year-old boy who had shown typical gargoyle features, strictly consistent with mucopolysaccharidosis type II (Hunter's syndrome) was reported. Histologically, cytoplasmic vacuolar change was found in hepatocytes, sinusoidal epithelium of spleen, follicular cells of thyroid, Sertoli cells of testis, chromophobe cell of pituitary and generalized fibroblast-like cells including meninges, cardiac valve and periosteum. The vacuoles consisting of membrane-bound structures with flocculus protein-like material and occasional electron dense bodies on electron microscopy, were considered to be the site of mucopolysaccharide deposition by histochemical analysis. Deposition of lipid material consistent with so-called membranous cytoplasmic body was observed in the neurons of central, peripheral and autonomic nervous system. Hepatosplenomegaly could be explained by cytoplasmic deposition, but the cause of cardiomegaly remained further to be studied. Biochemically hepatic mucopolysaccharide was identified as heparan sulfate, while in the kidney dermatan sulfate and heparan sulfate were detected. The correlation between morphology and biochemistry, and between deposition and degeneration was discussed.

Adult↗
PubMed1976

A case of unusual SLE related syndrome characterized by erythema multiforme, angioneurotic edema, marked hypocomplementemia, and Clq precipitins of the low molecular weight type.

Our patient and those of Agnello et al. had identical clinical symptoms such as erythema multiforme, arthralgias and angioneurotic edema and both differed from systemic lupus erthematosus in several important points, i.e., in spite of marked hypocomplementemia the nephropathy is not prominent and it needs high-dose steroids to eliminate the clinical and serological abnormalities. In addition to the features reported by Agnello et al. we found increased viral antibody titers in our patient's sera.

Adult↗