Takahiro Ogai

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The "8020" goal of retaining 20 or more teeth after the age of 80 necessitates investigating oral health status in people below the age of 80. The purpose of this study was to determine similarities and differences between people in their sixties attending college and achievers of the 8020 goal. The results of oral examination and occlusal force measurement(More)
The effects of nitroglycerin (NTG) on relaxation characteristics of the infarcted and non-infarcted myocardium were investigated by calculating a segment length on the epicardium of the left ventricle for 16 patients with old myocardial infarction. The spatial segment length was measured between two points which were identified as a junction of ramifying(More)
Several methods of digital subtraction angiography (DSA) were compared to determine which could better visualize regional myocardial perfusion using coronary angiography in seven patients with myocardial infarction, two with angina pectoris and five with normal coronary arteries. Satisfactory DSA was judged to be achieved if the shape of the heart on the(More)
It has been stated that the coronary flow paradoxically falls in response to tachycardia if the coronary artery is stenotic and "compliant". To clarify this, we measured coronary vascular resistance by cannulating the left anterior descending coronary artery in open-chest dogs. In constant flow perfusion of 41 +/- 5 ml/min/100 gm, coronary perfusion(More)
The left ventricular diastolic properties of patients with hypertrophic cardiomyopathy are impaired. Since there is degeneration or disarray of myocardial fibers in patients with hypertrophic cardiomyopathy (HCM), the rate of expansion in diastole may become asynchronous. Biplane coronary cineangiograms were performed in eight normal subjects and nine(More)
The effects of vegetation types and environmental factors on carabid beetle (Coleoptera: Carabidae) communities were studied. Carabid beetles were collected using pitfall traps (total 2844 trapping days) and seven microenvironmental factors were measured in four vegetation types: grassland, natural evergreen coniferous forest (Pinus densiflora), deciduous(More)
The shift of the heart during systole within the thorax was measured using bifurcations of the left coronary artery as cineangiographic markers. Biplane coronary cineangiography was performed in 13 normal subjects and 6 patients with non-obstructive hypertrophic cardiomyopathy (HCM). The spatial coordinates (X, Y, Z) of the bifurcations on the(More)
A mechanism for the genesis of early relaxation of the left ventricle was assessed. For 18 patients with coronary artery disease, biplane left coronary cineangiography was performed and the coordinates (x, y, z) of the points of the artery were measured by frame to frame basis throughout one cardiac cycle. The spatial distance (segment length) between any(More)
Left ventricular wall motion in patients with hypertrophic cardiomyopathy may show a characteristic movement since this condition is characterized by a disproportionate thickening of the wall and disorientation of myocardial muscle fibers. Biplane coronary cineangiograms were performed in 5 patients with hypertrophic cardiomyopathy and the spatial distance(More)