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	Damage and fatigue of actuating heart muscles
	Zhang, Xiang-Ming ; Ma, Nian-Ke ; Yang, Fan ; Zhao, Yong ; Yang, Wei
	2010-05-10 ; 2010-05-10
会议名称	IUTAM Symposium on Mechanics and Reliability of Actuating Materials ; IUTAM Symposium on Mechanics and Reliability of Actuating Materials ; Beijing, PEOPLES R CHINA ; Web of Science
关键词	actuating hear muscles in vivo tests damage fatigue cardiac pacing lead Materials Science, Multidisciplinary Mechanics Physics, Condensed Matter
中文摘要	Heart is the pump to make blood circulate in the vessels. The actuating heart muscles can generate intrinsic force making the heart chambers contract and diastole rhythmically under the stimulation of electronic signals. We carried out in-vivo experiments that screwed the lead tip of a heart pacer into the designated sites of heart and applied on controlled external excitation on the lead-myocardium interface. A special design of the helix tip using strain gauges and fiber optic sensors is instrumental for the measurement of the push-pull forces of lead-myocardium interactions during the tests. We observed that the interaction was mainly caused by the heart beating and influenced by the lungs breath. The in vivo heart had an ability of self-adjusting to protect itself from outside excitations. The security of the pacer attachment to the heart muscle is estimated for the fatigue and damage tests. In-vitro heart muscle specimen tests are also carried out for the parameters that characterize the constitutive relation of heart muscles.; Tsinghua Univ
会议录出版者	SPRINGER ; DORDRECHT ; PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18757]
专题	清华大学
推荐引用方式 GB/T 7714	Zhang, Xiang-Ming,Ma, Nian-Ke,Yang, Fan,et al. Damage and fatigue of actuating heart muscles[C]. 见:IUTAM Symposium on Mechanics and Reliability of Actuating Materials, IUTAM Symposium on Mechanics and Reliability of Actuating Materials, Beijing, PEOPLES R CHINA, Web of Science.

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