Norio Tanaka

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Previous reports have indicated that hypertensive patients who have angina-like chest pain and normal coronary arteriograms have reduced coronary flow velocity reserve (CFVR) levels. In addition, elevated plasma endothelin-1 (ET-1) levels have been reported to be associated with microvascular angina. The purpose of this study was to evaluate the plasma ET-1(More)
BACKGROUND The assessment of patients with chest pain is an important step to make a diagnosis and clinical decision. Coronary flow reserve (CFR) can be used for the screening of significant coronary stenosis. However, the feasibility and limitation of CFR in those patients remains unknown. METHODS AND RESULTS A total of 100 patients with chest pain were(More)
It is still unclear whether echocardiography with an automated boundary detection technique (ABD) can accurately determine the left ventricular (LV) volume and function particularly in the presence of LV wall asynergy. We intended to re-evaluate the reliability and application of the ABD, which was based on the acoustic quantification technique (Sonos 2500,(More)
OBJECTIVES Although transesophageal echocardiography is useful to identify various cardiovascular diseases, the semi-invasive nature of the examination hampers its routine application. We investigated whether conscious sedation using a low dose of intravenous midazoram was safe and useful during the examination. METHODS We asked 55 consecutive patients(More)
BACKGROUND Interatrial septum pacing (IAS-P) decreases atrial conduction delay compared with right atrial appendage pacing (RAA-P). We evaluate the atrial contraction with strain rate of tissue Doppler imaging (TDI) during sinus activation or with IAS-P or RAA-P. METHODS Fifty-two patients with permanent pacemaker for sinus node disease were enrolled in(More)
BACKGROUND Evaluating donor heart as accurately as possible upon the organ procurement would help lead careful post-transplant heart management. Our institution (National Cerebral and Cardiovascular Center, Osaka, Japan) has sent a transplant cardiologist upon the organ procurement for evaluating a donor heart ever since our first case of heart(More)
We report the importance of evaluating the right coronary artery (RCA) by two-dimensional echocardiography (2DE) in the acute phase of Kawasaki disease (KD), based on our experience with three patients whose coronary artery lesions (CAL) involving the RCA were missed in the acute phase of KD. Two patients had asymptomatic occlusion of the RCA, and it was(More)
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