| 离体心肌“生理性”收缩的计算机伺服系统 |
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| 引用本文： | 邹沙舟,李云霞.离体心肌“生理性”收缩的计算机伺服系统[J].生理学报,1992,44(4):420-425. |
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| 作者姓名： | 邹沙舟 李云霞 |
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| 作者单位： | 湖南医科大学心血管生理研究室，湖南医科大学心血管生理研究室 长沙 410078，长沙 410078 |
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| 基金项目： | 国家自然科学基金(No.3870185) |
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| 摘 要： | 扩充了A/D接口的Z-80微机和编制的软件,与肌力计和力位移双态换能器组成伺服系统,可以自动控制换能器金属杆的工作状态和“后负荷”水平,使离体心肌产生时相顺序类同于射血心室的四个时相“生理性”收缩,从而获得心肌的张力长度关系、作功量等心肌力学信息,并可同步观察收缩末期张力长度关系和张力速度关系。
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| 关 键 词： | 微机伺服系统 生理性收缩 心肌 |
Use of a computer-controlled servo system to produce "ephysiological" contraction of isolated rat papillary muscle] |
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| ZOU SHA-ZHOU,LI YUN-XIA Laboratory of Cardiovascular physiology,Hunan Medical Unicersity,Changsha.Use of a computer-controlled servo system to produce "ephysiological" contraction of isolated rat papillary muscle][J].Acta Physiologica Sinica,1992,44(4):420-425. |
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| Authors: | ZOU SHA-ZHOU LI YUN-XIA Laboratory of Cardiovascular physiology Hunan Medical Unicersity Changsha |
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| Institution: | Laboratory of Cardiovascular Physiology, Hunan Medical University, Changsa. |
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| Abstract: | A computer-controlled servo system consisting of an ergometer with a force-displacement dual mode transducer, a Z-80 single-board microcomputer and adesigned software was constructed. This servo system can be used to generatephysiological contractio. in isolated rat papillary muscle, in which the muscle wentthrough a complete 4-phase cycle of force and length changes, similar to those un-dergone by muscle fibers in the beating heart during the cardiac cycle. This system is being used to investigate the tension-length relation and the net-work of isolated myocardium as well as the end-systolic tension-length relation andthe force-velocity relation simultaneously. |
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| Keywords: | microcomputer servo control system physiological contration isolated rat |
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