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J Nagashima

Publications and source records attributed to J Nagashima.

At least 55 records · Page 3Linked to original sources
PubMed1993

[CT finding of right diaphragmatic rupture due to blunt trauma--subhepatic hemothorax].

Owing to the poor detectability of the anatomic location of diaphragm on the parallel plane of computed tomography (CT), capability of CT to predict traumatic ruptured diaphragm has been debated in several reports. A specific hematoma (subhepatic hemothorax) adjacent to the posterior attachment of the right diaphragm was identified on CT. The finding originated from herniated liver that migrated to the posterior thoracic wall as a result of gravity, to separate the hemothorax in the supine position. This was surgically proven in two patients after blunt traumatic accident. The finding is useful in predicting right diaphragmatic rupture on CT study. The formation of subhepatic hemothorax, its differential diagnosis and a brief review of diaphragmatic rupture are discussed.

Adult↗
PubMed1992

A case of right atrial mobile thrombus complicating multiple pulmonary emboli.

Right atrial thrombi are usually immobile. However, a mobile type mimicking a cardiac tumor, especially myxoma, has been described on rare occasions. We report here a case of atrial thrombus which was mobile in the cardiac chambers. A 29-year-old male was admitted because of exertional dyspnea. On admission, his echocardiogram showed an abnormal mass in the right atrium with a stalk attached to the interatrial septum. It decreased in size on the next day. On the fourth day of admission, it moved to the right ventricle. Multiple pulmonary emboli were revealed by the lung perfusion scintigram. Two days after the administration of intravenous urokinase, the abnormal mass in the cardiac chambers was no longer seen on the echocardiogram. This was a rare case of mobile atrial thrombus associated with multiple pulmonary emboli. Thrombolytic therapy appeared to be effective in this case.

Adult↗
PubMed1991

[Doppler and echocardiographic assessments of effects of disopyramide on non-obstructive hypertrophic cardiomyopathy].

We assessed the effects and therapeutic implications of disopyramide on left ventricular systolic and diastolic functions in 19 patients with non-obstructive hypertrophic cardiomyopathy by Doppler echocardiography. All patients were in sinus rhythm. Parameters measured were fractional shortening (FS (%)), mean velocity of circumferential fiber shortening (mean Vcf (circ/sec)), ejection fraction (EF (%)), peak left ventricular outflow velocity (peak-LVOT (cm/sec)), peak rapid filling inflow velocity (peak-R (cm/sec)), peak late filling inflow velocity (peak-A (cm/sec)) and peak-A/peak-R ratio (A/R ratio). These values were compared before and after infusion of disopyramide (2 mg/kg). There was no significant difference in heart rate, systolic and diastolic blood pressures before and after infusion of disopyramide. Following the intravenous drip infusion of disopyramide, FS decreased from 38.1 +/- 5.4 to 33.2 +/- 4.9 (p less than 0.05) and the mean Vcf decreased from 1.285 +/- 0.181 to 1.141 +/- 0.188 (NS). EF and peak-LVOT also decreased from 67.7 +/- 6.3 to 61.9 +/- 7.0 (p less than 0.05), and from 107.6 +/- 29.5 to 92.4 +/- 25.2 (p less than 0.01), respectively. The infusion of disopyramide increased the peak-R from 47.3 +/- 18.2 to 55.5 +/- 19.2 (p less than 0.05), and decreased peak-A from 52.0 +/- 13.6 to 40.2 +/- 12.6 (p less than 0.01), resulting in a decrease of A/R ratio from 1.277 +/- 0.537 to 0.818 +/- 0.475 (p less than 0.01). These results suggest that disopyramide improved left ventricular diastolic function, although systolic function decreased slightly. In conclusion, disopyramide can be also used beneficially in non-obstructive hypertrophic cardiomyopathy without arrhythmias.

Adult↗
PubMed1990

Müllerian duct cyst: ultrasonographic and computed tomographic spectrum.

A Müllerian duct cyst (MDC) is the persistent remnant of the Müllerian duct. Reports of symptomatic cases are rare, signs and symptoms include perineal pain, dysuria, infertility, hematuria and genital inflammation. The prevalence of MDC has been previously reported as 4% of newborns and 1% in adult males. Herein we report six cases encountered in the past year. Our detection percentage was 1% and is compatible with the reported values. The imaging evaluation of symptomatic and asymptomatic patients with MDC is discussed as well as the apparent discrepancy between the number of previously reported cases and the reported prevalence.

Adolescent↗
PubMed1989

[A case of myelolipoma originating from bilateral adrenal glands; a comparison of CT and pathological findings].

We experienced a case of bilateral retroperitoneal tumor incidentally on CT which was carried out on suspicion of either cholelithiasis or choledocholithiasis. In company with other radiologic studies, US, angiography etc. we were able to make a correct diagnosis of adrenal myelolipoma preoperatively. Among these studies, CT coincided well with the structure of pathological findings and is thus the most powerful method for the diagnosis of myelolipoma. The case was discussed in addition to the studies of other literatures.

Adrenal Gland Neoplasms↗
PubMed1987

A clinicopathologic correlation study of thallium-201 myocardial scintigraphy in diagnosis of myocardial infarction.

In a series of 1,000 consecutive autopsy cases, we evaluated the clinical utility of thallium-201 (Tl-201) myocardial scintigraphy and electrocardiography (ECG) in 101 patients who had been studied while alive. Fifty-five cases had myocardial infarctions (MI) at autopsy. The Tl-201 scintigram and ECG in diagnosis of MI showed sensitivities of 68% and 60%, specificities of 87% and 83%, and diagnostic accuracies of 76% and 70%, respectively. The sensitivity of the Tl-201 scintigram was 70% in anterior MI, 80% in postero-inferior MI, 25% in lateral and subendocardial infarction. The sensitivity was 88% for large massive MI, but was low in scattered (50%) or middle-sized MI (17%). The diagnostic limit of the resolution of Tl-201 scintigrams was 4.5 cm in long diameter. All 8 cases with MI of less than 4 cm could not be diagnosed with the technique. There were 48 cases of large MI (more than 5 cm), but 8 cases could not be diagnosed by scintigraphy because of non-transmural or scattered MI. A comparison of the Tl-201 scintigram and ECG showed that 27 cases out of 60 cases were diagnosed by both methods, 14 only by the Tl-201 scintigram, 9 only by ECG and 10 by neither method.

Aged↗
PubMed1986

[Evaluation of thallium-201 myocardial emission computed tomography based on a comparison with postmortem findings].

The correlative study of myocardial perfusion assessed by 201Tl myocardial ECT with the pathological finding of the heart was performed in 10 autopsied cases with mean age of 77 years old (range: 60-90 y). In 6 cases with myocardial infarction (MI) 7 perfusion defects were observed, that was, 3 in anteroseptal wall, 1 in anterolateral wall and 3 in posterior wall on the images of SPECT. Seven MIs were also found in postmortem examination. Six MIs were observed at autopsy corresponding to perfusion defect on SPECT images. In one myocardial perfusion defect at inferoposterior portion on SPECT, a non-transmural MI was found at anteroseptum. In one case with valvular disease a false positive result was obtained at posterior wall where neither myocardial necrosis nor fibrosis was observed at autopsy. This case had aortic stenosis due to bicuspid aortic valve by autopsy. The ventricle was divided into 16 segments in each of 4 short axial images to evaluate extent of MI. SPECT for extent of MI showed sensitivity of 81.9%, specificity of 96.0% and diagnostic accuracy of 92.5%. False negative segment was apt to be observed at the surrounding of non-transmural MI or basal half of left ventricle (LV) with transmural MI, while false positive segment was at posterior portion of basal half of LV. It was concluded that myocardial ECT was useful for evaluation of the site and extent of MI.

Aged↗
PubMed1984

[Quality control of radioimmunoassay by bivariate analysis].

Automatic calculation of control charts for precision and accuracy of radioimmunoassay was reported by Faure, et al. Duplicate control samples independently measured was assumed to have a bivariate normal distribution. In this case they assumed that the correlation coefficient between each value of the pairs of control samples is zero. Our experience using this method revealed that a considerable number of assayed samples distributed outside the calculated control limits in case of "accuracy control". It was considered that this happened because in radioimmunoassay the between-assays precision is usually larger than the within-an-assay precision and there is a significant correlation between values of duplicates. We also found equal probability density did not make a true circle but a long circle. Therefore in the present paper we proposed for control charts of radioimmunoassay an equal probability long circle calculated by bivariate analysis of Mahalanobis' generalized distance. It was found that a Mahalanobis' long circle could explain the density distribution of radioimmunoassay with a reasonable percent of samples outside the calculated control limits. What happened here can be interpreted by a large between-assays variability shown by some commercial kits. This automatic calculation method could be applied not only for quality control but also for evaluation and comparison of radioimmunoassay system or commercial kits. Control survey could also be analyzed by such a method.

Analysis of Variance↗