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New type admixtures were developed for High-fluidity and Super-low shrinkage concretes with water-cement ratio of 40-55%. Properties of fresh and hardened concretes using these admixtures were studied by laboratory test. Properties of these hardened concretes, such as strength and durability were investigated experimentally. Furthermore, effects of reducing and restraining cracks using these admixtures were verified by test on drying shrinkage cracking of restrained concrete. More than 10% drying-shrinkage reduction was obtained for super-low shrinkage concrete using one of these admixtures compared to ordinary concrete. This concrete was applied to a fair-faced wall of a building in Hyogo.

The patient presented with complete atrioventricular block and dyspnea. They had a primary cardiac tumor originating in the coronary sinus, a rare site of origin. It filled the sinus and involved the right atrium. The patient might have presented with complete atrioventricular block due to tumor invasion and respiratory distress due to elevated LVEDP as the tumor filled the coronary sinus. As for anesthesia management, in addition to the usual management, we observed CS obstruction and also considered myocardial protection methods. It is important to anticipate the risks and develop an appropriate anesthetic plan accordingly.

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