Читать книгу Manual of Equine Anesthesia and Analgesia - Группа авторов - Страница 147

 Absence of a P wave indicates sinoatrial block.

 P waves may be absent or “hidden” in the following conditions.Hyperkalemia: No P wave, tall T waves and wide QRS complexes.Atrial fibrillation: No P wave and the rate is irregular, and f waves are present.Ventricular tachycardia: P waves hidden in QRS complexes, and presence of wide and bizarre QRS complexes.P wave may be “hidden” in the previous QRS complex during atrial or sinus tachycardia. The morphology of the QRS complex is normal.