Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 148
Is each P wave followed by a QRS complex?
ОглавлениеSecond‐degree heart block (see Figure 3.4).Occasional absence of AV conduction.P wave is not followed by a QRS complex (see below Section IV, C).
Third‐degree heart block.The condition is rare in horses.P waves not followed by a QRS complex.This is a “complete heart block” and atrial impulses are not conducted through the AV node.The condition is most likely related to pathology of the AV node.The HR is slow because the ventricles are contracting at their intrinsic rate (escape rhythm).P waves have normal morphology but have no relationship with QRS complex.The QRS complex can be normal or have a bizarre shape depending on its location of origin.
