Publications by authors named "Shuji Toyama"

Cardiac metastases of thyroid cancer are rare. The most common metastatic route is through lymphatic or hematogenous spread to the right side of the heart. Direct invasion of metastases from other adjacent organs to the left side of the heart is even rarer.

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Background: Arterio-venous fistula is a rare clinical entity that occurs as a result of a ruptured abdominal aortic aneurysm into the inferior vena cava or iliac vein. Open surgery has been considered the treatment of choice for this condition; however, endovascular repair has become an evolving therapeutic option over the past 20 years. The endovascular treatment has contributed to a decrease in the perioperative mortality; nevertheless, some endovascular repair specific concern for residual fistula still remains.

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The patient was a 72-year-old man, who had undergone total arch replacement with an open-stent graft due to saccular aneurysm of distal arch, 2 years before. He was admitted to a local hospital with the complaint of high fever, and was diagnosed as having pyothorax, after computed tomography (CT) scanning. After transferred to our hospital, he was treated by drainage, and antibiotic therapy.

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We report a case of discrete type subaortic stenosis disclosed by hemolytic anemia 7 years after aortic and mitral prosthetic valve replacement. A 53-year-old female complained of general fatigue, dyspnea, macrohematuria and hemolysis. She had undergone aortic valve replacement for non-coronary cusp perforation 15 years before, and mitral valve replacement and tricuspid annuloplasty 7 years before.

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A 56-year-old male was admitted to our hospital for acute type B aortic dissection. He received conservative therapy but follow-up computed tomography (CT) revealed a low-enhanced left kidney and severe stenosis of the left common iliac artery due to the expansion of the false lumen. Serum blood urea nitrogen (BUN) and creatinine increased and renovascular hypertension worsened with severe intermittent claudication of the left leg.

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A 79-year-old female underwent open mitral commissurotomy and thrombectomy for mitral valve stenosis and thrombus in the left atrium 21 years ago. She was admitted for congestive heart failure because of recurrent mitral valve stenosis. Cardiac echocardiography showed severe mitral valve stenosis and the calcification of the left atrium wall.

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Background: Epicardial adipose tissue (EAT) surrounding the heart may contribute to the development of coronary artery disease (CAD) through its local secretion of adipocytokines. Although the quantity of EAT is associated with obesity and metabolic syndrome, the role of EAT in the development of CAD in non-obese patients remains to be determined.

Methods: This study included 41 patients with CAD who underwent coronary artery bypass graft surgery and 28 patients without CAD who underwent other cardiac surgery.

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56-year-old male, who had undergone re-aortic valve replacement (AVR) 33 years ago, received preoperative study for pancreatic surgery. Computed tomography (CT) revealed a giant pseudoaneurysm (7 cm diameter) of the ascending aorta. The ascending aorta was not dilated.

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Cardiac rupture is a catastrophic complication of acute myocardial infarction with highly mortality rate. Three types of rupture are ventricular free wall rupture( VFR), ventricular septal rupture( VSR), and papillary muscle rupture( PMR). A combination of any 2 types of rupture is called ventricular double rupture (VDR), and very rare.

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We present a rare case of papillary fibroelastoma arising from the pulmonary valve. A 45-year-old man had been suffered from palpitation. Transthoracic echocardiography clearly demonstrated a mobile rounded mass in the right ventricular outflow tract.

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Evidence from several studies indicates the importance of Gαq protein-coupled receptor (GPCR) signaling pathway, which includes diacylglycerol (DAG), and protein kinase C, in the development of heart failure. DAG kinase (DGK) acts as an endogenous regulator of GPCR signaling pathway by catalyzing and regulating DAG. Expressions of DGK isoforms α, ε, and ζ in rodent hearts have been detected; however, the expression and alteration of DGK isoforms in a failing human heart has not yet been examined.

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A 71-year-old female fell down the stairs, hit the right chest and was admitted to our hospital with right chest pain. Computed tomography revealed cardiac effusion and left hemothorax due to traumatic cardiac injury. She underwent emergency operation.

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A 27-year-old woman was hospitalized by emergency due to multiple blunt trauma by traffic accident. Computed tomography (CT) showed pericardial effusion. Because hematothorax and pericardial effusion appeared alternatively, thoracocentesis and pericardiocentesis were performed.

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A 77-year-old female was admitted to our hospital with a diagnosis of severe mitral regurgitation. Cardiopulmonary revival was done by an emergent resuscitation for the ventricular fibrillation before admission. She had mild anoxic brain damage and brain magnetic resonance imaging (MRI) revealed severe brain atrophy.

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