テレメーターによる運動時ヘクトル心電図の記録に関する研究 : その方法と臨床成績
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概要
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Using a 3-channel telemeter, an electrocardiograph and a data recorder, the author tried to record vectorcardiogram (VCG) continuously be-fore, during and after exercise. Methods Seventy in- and out-patients in the 2nd Department of Internal Medicine were examined in this study. They included 50 persons without cardiopulmonary disease (33 males, 1 7 females) and 20 patients with complete or incomplete right or left bundle branch block (b.b.b.) (18 males, 2 females). The telemeter employed was a 3-channel FM-FM Model TPE-300R of Fukuda Electro Co. The wave frequencies of the main carrier and the subcarriers were 27.12 Mc/s, and 1.7 kc/s, 3.0 kc/s and 5.4 kc/s, respectively. Four 9-volt dry cells were used as the power supply, and the total time constant was above I .5 seconds. The original Frank's lead system was modified by the author so that the electrodes did not interfere the exercise, the Y electrode at the left leg for the original system being shifted to the left epigastric spot lying on the vertical line passing through the point C of the original system, and the earth electrode at the right leg for the original system to the right epigastric region: At first, scalar electrocardiograms (SECGs) were taken at rest with the original Frank's system and the modified Frank's system in all the 70 cases, using the 3-channel telemeter to get the coefficients for coordinate transformation. Then, the SECGs Of the modified Frank's system were recorded on a magnetic tape by setting the output of the 3-channel telemeter for a Sony data recorder through a multipurposed preamplifier PRE 104 of Kokusai Denshi Kogyo Co. These records were performed both in the 18 healthy and in the 5 with b.b.b., every 30 seconds, for 30 seconds, from a few moments be-fore the beginning of the exercise until 5 minutes after its ending. The magnetic tape was set for the vectorcardiograph of Model FVC-3 of Fukuda Medical Electric Co. to get a VCG. The exercise was performed by the about 3-minute walking at an ordinary speed along a flat hospital corridor which was about 250-meter long and the following 3-minute riding on a fixed bicycle at a speed of 30 km/h. For the purpose of calculating the coefficients of coordinate transformation between the original and the modified Frank's systems, the SECGs at rest were reproduced by fitting the output of the vectorcardiograph to a 3-channel electromagnetic oscillograph of Fukuda Electro Co. The exercise VCG was interpreted theoretically by transforming its coordinates into the original Frank's coordinates through the Coordinate Changer divised by us.
- 社団法人日本循環器学会の論文
- 1970-07-20
著者
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