食道心臟曲線の波型の研究 : 正常食道心臟曲線に就て
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概要
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All waves of the esophagocardiogram have been carefully and thoroughly studied and the significance of the esophageal pulse described. The purpose of this paper is to report on the result of an analysis of the esophagocardiogram of 36 healthy subjects. A small condom rubber balloon was attached to one end of a duodenal tubing, the other end being led to a Frank segment capsule. A U-tube water manometer and a syringe were connected to this channel to adjust the pressure within it, and a copper ring was connected with a fine copper wire to an electrocardiograph to enable the simultaneous recording of the esophagocardiogram and esophageal lead ECG of the same level in the esophagus. The waves of the esophagocardiogram were found to vary markedly with the level in the esophagus. When obtained from behind the large vessels, there was a small negative As wave and a positive Vs wave, followed by a very deep negative Vs-VD wave, with point d at its bottom. The esophagocardiogram obtained from behind the left auricle consisted of three positive waves, namely the As wave due to the contraction of the left auricle, the Vs wave due to the isometric contraction of the left ventricle, and the D wave due to the pressure variations of the left auricle during the latter half of systole and early half of the diastole, with point d at its summit, which is synchronous with the second sound of the heart. In the esophagocardiogram from behind the left ventricle, As is negative, Vs consists of 1-2 oscillations and Vs-d-VD forms a very deep negative wave, with point d at its bottom. In the esophagocardiogram obtained from behind the left auricle, Da-d/d-De is normally between 1.2-2.0, and the Vs-D segment does not deviate more than 1 cm from the Vs base line. The three types of waves mentioned above are the typical waves to be found in normal subjects of their respective levels. The waves from between these levels are usually of mixed form. The effect of respiration, tachycardia, bradycardia and change of position of the body on the wav
- 1952-06-28
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