Masahiro Ueno

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Coronary artery aneurysm (CAA) is an uncommon disease with an incidence of 1%-5% in evaluated patients. Atherosclerosis is its most common etiology in adults, occurring in 50% of cases. Also, CAA is associated with predisposing factors such as Kawasaki disease, stent-angioplasty, and notably, coronary artery fistula. Most CAAs are asymptomatic but(More)
Several subvalvular procedures have been developed for relocating one or both displaced papillary muscles. We describe an original procedure--papillary muscle elevation--in which we relocated the posterior papillary muscle selectively, through a small inferior ventriculotomy, and reduced the coaptation depth from 5 mm to zero. Our procedure can be(More)
We examined the feeding niche of four species of molluscs by analysis of their stable isotope signatures and cellulase activities to determine if they could utilize terrestrial organic matter. The molluscs and potential food sources were collected from the upper, middle and lower estuary of the Yura River from spring 2007 to winter 2008. All species showed(More)
Juvenile temperate seabass Lateolabrax japonicus were sampled along the Yura River estuary from April to July 2008 to determine their distribution and feeding habits during migration within a microtidal estuary. Throughout the sampling period, juvenile seabass were distributed not only in the surf zone, but also in the freshwater zone, and they were(More)
We conducted laboratory experiments to examine the effects of turbidity on the survival of red sea bream Pagrus major and ayu Plecoglossus altivelis altivelis larvae when exposed to either visual (jack mackerel juveniles) or tactile (moon jellyfish) predators. The experiments were conducted in 30-l tanks with three different levels of turbidity obtained by(More)
It is important to know the characteristics of migration pattern and vital rates of juveniles to understand the early life history and its effect on the population dynamics of fishes. The relationship between growth and migration pattern of juvenile temperate seabass Lateolabrax japonicus in the Yura River estuary was examined by combination of stable(More)
OBJECTIVE There are few data available on the effect of ultrasonic skeletonization with the harmonic scalpel on internal thoracic artery (ITA) and gastroepiploic artery (GEA) vessel function. METHODS Rings of segments of the skeletonized ITA, pedicled ITA, skeletonized GEA, and pedicled GEA were studied. Arterial segments were treated with high KCl and(More)
BACKGROUND The aim of this study was to investigate the mid-term changes of left ventricular (LV) geometry and function after Dor, septal anterior ventricular exclusion (SAVE), and Overlapping ventricular remodeling procedures. METHODS Forty-three patients who underwent LV reconstruction for end-stage ischemic heart disease, were divided into three(More)
A 24-year-old woman, who had undergone an aortic valve replacement with a 21-mm St. Jude Medical mechanical aortic valve, wished to have a child. She visited our department because she was aware of the risks associated with pregnancy while undergoing anticoagulant therapy using warfarin potassium. The patient opted to undergo the recommended alternative(More)
BACKGROUND Procedures on the subvalvular apparatus are an etiology-based treatment for ischemic mitral regurgitation (IMR). METHODS AND RESULTS Fifty-nine patients with IMR were divided into 3 groups: mitral annuloplasty (MAP) (M group, n=27), MAP+left ventricular reconstruction (LVR) (LV group, n=18), and MAP+LVR+subvalvular procedure (S group, n=14).(More)