Clinical electrocardiography . Fig. 125.—Electrocardiogram of patient with patent ductus arteriosus (Botalli).Preponderance of the right ventricle. auriculoventricular dissociation is present and an unusual mechan-ism resulting in a ventricular rate greater than the rate of theauricles. This is due to a constant progression of the auricular im-pulse which is ectopic (Fig. 125). Bibliography 1. Abbott, Maude, E.: Congenital Cardiac Disease. In Osier, W., and McCrae, T, Modern Medicine, Philadelphia, Lippincott, 1908, iv, 323-448. 2. Hirschfelder, A. D.: Diseases of the Heart and Aorta, Philadel


Clinical electrocardiography . Fig. 125.—Electrocardiogram of patient with patent ductus arteriosus (Botalli).Preponderance of the right ventricle. auriculoventricular dissociation is present and an unusual mechan-ism resulting in a ventricular rate greater than the rate of theauricles. This is due to a constant progression of the auricular im-pulse which is ectopic (Fig. 125). Bibliography 1. Abbott, Maude, E.: Congenital Cardiac Disease. In Osier, W., and McCrae, T, Modern Medicine, Philadelphia, Lippincott, 1908, iv, 323-448. 2. Hirschfelder, A. D.: Diseases of the Heart and Aorta, Philadelphia, Lippincott, 1918, p. 533. 3. Hoke, E.: Ueber das Elektrokardiogramm eines Falles von Situs viscerum inversus totalis, Miinchen. med. Wchnschr., 1911, lviii, 802. 148 CLINICAL ELECTROCARDIOGRAPHY 4. Lewis, T.: Electrocardiography and its Importance in the Clinical Examina- tion of Heart Affections, Brit. Med. Jour., 1912, i, 1421-1423; 1479-1482;ii, 65-67. 5. Neuhof, S.: Clinical Cardiology, New York, Macmillan, 1917, p


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