Study of the Ambulatory ECG on the Dog:<B>I.Lead Method and Jacket Putting applied to the Ambulatory ECG Recording</B>
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概要
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A technique was devised to obtain a stable ambulatory electrocardiogram from a dog neither anesthetized nor constrained. Fissuly, an improvement of the jacket was made to prevent the electrodes from detaching during the recording of the electrocardiogram. An innovation of a foreleg sleeve fitted to beagle's body measurements successfully prevented the detachment of the electrodes.<BR>Next, a comparative study was carried out the three lead methods, A-B, M-X and supplementary, to be used for protracted electrocardiography. The study was completed by analyzing the beagle electrocardiograms obtained by these three lead methods over a period of 24 hours.<BR>With the A-B lead, the base line in the electrocardiogram fluctuated according to the dog's movements 315 times during 24 hours, the fluctuation being the most marked among the three methods. The R wave diminished in height remarkably and the S wave increased in depth impairing the effectiveness of the analysis.<BR>The supplementary lead proved inappropriate, because the base line fluctuated by breath-impedance changes and affected the analysis.<BR>The M-X lead was better than the other two methods. The base line fluctuation was minimal 26 times during 24 hours, less than 10% of the fluctuation in the A-B lead.<BR>We have thus succeeded in devising a technique for obtaining a satisfactory electrocardiogram over a period of many hours, by using the M-X lead and attaching the renovated jacket to an unanesthetized and unconstrained beagle.
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