Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 156

 A normal QRS complex appears before expected; therefore, the R–R interval is shorter between the previous normal beat and the premature beat.

 The “P” wave can be absent (hiding) if the PAC occurred to soon after the normal beat.

 Can be incidental or associated with heart disease that has caused enlarged atria, or myocarditis or hypokalemia.

 A solitary PAC is not likely to be significant if not associated with clinical signs and does not occur during exercise.

Figure 3.5 Atrial fibrillation.