Publications by authors named "Noriyuki Hatanaka"

A 61-year-old woman presented to our hospital with complaints of palpitation, dyspnea, and complete atrioventricular block. A tumor filling the right atrium was detected by computed tomography (CT)and echocardiography. Since the symptoms were severe and there was a risk of sudden death due to pulmonary embolism, tumor resection was performed.

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In patients with aortic stenosis (AS), measurement of aortic valve calcification (AVC) using computed tomography (CT) is recommended in cases where echocardiographic measurements are inconclusive. However, sex-specific AVC thresholds proposed in the guidelines for predicting severe AS (women: 1,200 arbitrary units [AU]; men: 2,000 AU) are based on studies from Western countries. We retrospectively included 512 Japanese patients with at least moderate AS who underwent transthoracic echocardiography and CT.

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Right-sided aortic arch (RAA) is a rare congenital disorder. A 87-year-old man with chest pain was diagnosed with a right-sided aortic arch and Kommerell's diverticulum by computed tomography (CT). The diverticulum had a maximum diameter of 57 mm, and surgical intervention was chosen because of the possibility of rupture and dissection.

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A 67-year-old woman was admitted with exertional dyspnea. She had undergone mitral valve replacement with Björk-Shiley prosthetic valve (convexo-concave type) 36 years previously for stenosis and regurgitation in another institute. An echocardiography showed a severe degree of aortic stenosis, and the implanted mitral valve function is normal.

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An aberrant right subclavian artery (ARSCA) is a relatively rare congenital anomaly of the aortic arch branches. A 63-year-old man suffered from dysphagia, and was referred to our hospital. Computed tomography (CT) revealed an aortic aneurysm (Kommerell's diverticulum) and ARSCA which routed behind the esophagus.

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A rare case of mitral stenosis after mitral valve repair for non-rheumatic mitral regurgitation is presented. An 81-year-old woman who had undergone mitral valve repair using an annuloplasty ring 12 years earlier, was referred to our hospital because of dyspnea during exertion. As echocardiography revealed severe mitral stenosis, and redo surgery was carried out.

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We report a rare case of a 49-year-old man with biventricular thrombi associated with idiopathic dilated cardiomyopathy (DCM). The patient was admitted with congestive heart failure and pneumonia. Echocardiography revealed mobile "ball-like" biventricular thrombi associated with significantly impaired left ventricular function and severe mitral/tricuspid valve regurgitation.

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A surgical case of a 65-year-old man with aortitis syndrome is presented. The patient had undergone aortic valve replacement for aortic valve regurgitation with a mechanical prosthesis, followed by a re-do operation (valve fixation) for prosthetic valve detachment 6 months after the 1st operation. Three months after the 2nd operation, perivalvular leakage due to valve detachment was detected again.

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A 69-year-old man was admitted with progressive congestive heart failure due to ischemic mitral valve regurgitation. He had previously undergone coronary artery bypass grafting( CABG) using bilateral internal thoracic arteries( ITAs) and saphenous vein grafts( SVG). An angiogram revealed patent bilateral ITAs and stenosis of the SVG affecting the left circumflex (LCX) branch, which persisted despite repeated catheter intervention.

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