Endo Y, Tajima M, Kurosawa T, Takahashi K, Sonoda M
Department of Veterinary Internal Medicine, Rakuno Gakuen University, Ebetsu, Japan.
Nihon Juigaku Zasshi. 1990 Dec;52(6):1155-61. doi: 10.1292/jvms1939.52.1155.
A case of Wolff-Parkinson-White (WPW) syndrome in a Holstein-Freisian cow aged 10-year-old was examined in detail. In electrocardiogram (ECG), the P-wave was the same configuration in both the normal and abnormal ECG. The PR-interval shortened from 0.2 to 0.1 second and the duration of the QRS-complex prolonged from 0.1 to 0.12 second compared with normal ECG. The delta wave, characterized in WPW syndrome, could not be recognized. In echocardiogram, notches were recognized at the early stage of ventricular contraction in the interventricular septum. This cow was, therefore, diagnosed as type B WPW syndrome. The abnormal ECG disappeared by the administration of procainamide. It was strongly indicated that the ventricular contraction showing abnormal ECG was generated only by the stimulation through an accessory pathway in this cow.
对一头10岁的荷斯坦-弗里生奶牛的预激综合征（WPW）病例进行了详细检查。在心电图（ECG）中，正常和异常心电图的P波形态相同。与正常心电图相比，PR间期从0.2秒缩短至0.1秒，QRS波群时限从0.1秒延长至0.12秒。未识别出预激综合征特有的δ波。在超声心动图中，室间隔在心室收缩早期可见切迹。因此，这头奶牛被诊断为B型WPW综合征。静脉注射普鲁卡因酰胺后异常心电图消失。强烈提示该奶牛出现异常心电图的心室收缩仅由旁路刺激产生。
