Local Diagnosis of Myocardial Injury by Vectorpolyography : Part 1 Subepicardial Injury

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概要

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• To get some fundamental informations concerning the electrocardiogram in myocardial infarction, I tried a vectorial observation in the experiments by injurying the myocardium from the epicardial surface on the heart of the tord by using the vectorpolyography with scarce strain. (1) Immediately after the injury the RS-T junction was not located on the zero point but deviated toward the direction resembling that of the outward normal line at the centre of the injured surface. (2) The QRS loop in injury traced the course before injury for a certain moment after the start and then began to be deformed, pulling itself more and more toward the displaced RS-T junction in injury. (3) It was difficult to explain the above mentioned experimental results from the negativity theory by Fahr et al. (4) Using the renovated membrane theory by Wilson and others, I expressed the equations which are able to bring together complicated processes for the appearance of the monophasic curves of many kinds, from the onset of the QRS group to the displaced RS-T junction. (5) Trying a model calculation by the above stated equations in vectorcardiography when the myocardium is injured, I indicated that the vector of the RS-T junction in injury should be directed toward the vector sum of the moment of the equivalent electrical double sheet at the surface which bounds the injured and the uninjured region. As it may be considered that this direction of the vector sum resembles nearly the direction of the outward normal line at the centre of the injured surface, consequently the results of my experiments may be explained by my consideration. On calculation, vectorpolyography has the least strain in this department, too. (6) It was proved mathematically that the deformation of QRS loop should occur early when the portion is injured where the arrival of the excitation wave is early when not injured, and that should occur late when the portion is injured where the arrival is late.

• 社団法人日本循環器学会の論文
• 1952-05-20

著者

• Yamada Takahiko

  The First Department Of Internal Medicine Nagoya University School Of Medicine

• Yamada Takahiko

  The First Department Of Internal Medicine Nagoya University School Of Medicine:toyoshima Laboratory

関連論文

• Local Diagnosis of Myocardial Injury by Vectorpolyography : Part 1 Subepicardial Injury
• 201) The Possibility of Integral Electrocardiography(Proceedings of the 18th Annual Meeting of the Japanese Circulation Society)
• 199) Effect of Body Impedance on Unipolar Limb Leads Electrocardiography(Proceedings of the 18th Annual Meeting of the Japanese Circulation Society)
• Local Diagnosis of Myocardial Injury by Vectorpolyography : Part 2 Subendocardial- and Transmural Injury

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