Kaori Yamaguchi

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BACKGROUND In patients with renal failure on hemodialysis cardiovascular disease is a major cause of death. It has been reported that diminished heart rate variability (HRV) relates to the unfavorable prognosis in post-infarction and/or heart failure patients. However, the prognostic value of HRV in hemodialysis patients has not been fully established. (More)
BACKGROUND In a recent study the indexes of cerebral oxygenation decreased during maximal exercise in nearly half of all patients with left ventricular dysfunction. Whether these levels decrease severely enough to influence mental status or level of consciousness was evaluated in the present study. METHODS AND RESULTS Forty-two patients with idiopathic(More)
BACKGROUND Although it is assumed that cerebral oxygenation during exercise is influenced by both cardiopulmonary function and cerebrovascular arteriosclerosis, the latter factor has not been fully clarified. In the present study the relationship between the degree of cerebrovascular arteriosclerosis and cerebral oxygenation during exercise was(More)
BACKGROUND It has been recently reported that cerebral oxyhemoglobin (O(2)Hb) decreases during exercise in nearly 50% of patients with dilated cardiomyopathy. The present study evaluated whether the inhalation of supplemental O(2) diminishes the decrease in cerebral O(2)Hb during exercise. METHODS AND RESULTS Ten patients with a left ventricular ejection(More)
Central sleep apnea (CSA) is thought to arise as a consequence of chronic heart failure. We have attempted to determine the relationship between the severity of CSA and the respiratory gas indexes during cardiopulmonary exercise testing (CPX), indexes well-known to reflect the severity of heart failure. Twenty consecutive cardiac patients (59.0 +/- 15.3(More)
Diabetic mastopathy is a source of diagnostic confusion with breast carcinoma. The association between mastopathy and Type I and II diabetes of long duration has been reported, but this clinical condition is poorly recognized since the clinical, mammographic, and sonographic findings simulate breast cancer. We report a case of diabetic fibrous mastopathy(More)
AIM To clarify the activity of demented patients cared for with and without artificial nutrition in a care facility, sequential biological observation was applied using electroencephalograms (EEG), electromyograms (EMG) and electro-oculograms (EOG). METHODS Awake and sleep patterns and spontaneous swallowing were measured during the daytime in 13 patients(More)
Earlier studies have demonstrated that an impaired capacity to increase heart rate (HR) and a slowed HR recovery following exercise are both associated with cardiovascular mortality. We sought to determine whether HR profiles during exercise testing are superior to respiratory gas parameters in predicting mortality among patients with cardiac disease.(More)
Hydro gel formed by 5'-guanosine monophosphate (GMP) in the presence of a potassium ion is expected to exhibit interesting selectivity in capillary electrophoretic separations. Here, we estimated the conditional association constants between the hydro gel (G-gel) and aromatic compounds by capillary electrophoresis in order to investigate the separation(More)
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