THE RELATION BETWEEN THE POSITION OF EXPERIMENTAL MYOCARDIAL LESIONS IN THE DOG AND THE CHANGES IN THE RS-T SEGMENT OF THE ELECTROCARDIOGRAM

Abstract

The changes in the level of the R-T and S-T segments of the electro-cardiogram were studied following the production of myocardial lesions in the dog. The lesions were produced by means of radon implants. An attempt was made to correlate the position of the lesion with the changes in the level of R-T and S-T. Lesions on the anterior surface of the left ventricle consistently produced changes of the T1 type. Lesions on the posterior surface of the left ventricle resulted in changes of the T3 type in 6 of 7 dogs studied. One showed no change. Lesions on the anterior surface of the right ventricle resulted in changes of the T1 type in 5 of 8 dogs studied. The remaining 3 showed no change from the normal. Lesions on the posterior wall of the right ventricle resulted in changes of the T3 type in 4 dogs, the T1 type in 2 dogs, and no change in one.