Atrioventricular separation is seen in third-degree atrioventricular block, ventricular tachycardia, interferential disconnection of the junctional zone, and atrial fibrillation on electrocardiograms. 1. Third-degree atrioventricular block: Due to an abnormality in the conduction system of the heart, the electrical impulses conducted to the atria cannot pass through the atrioventricular node to the ventricles, resulting in the atria and ventricles beating separately and the atrial beating rhythm being larger than the ventricular rhythm. 2. Ventricular tachycardia: Rapid excitation of the intraventricular conduction system or ventricular muscle, recurrent periods of inappetence in the ventricular muscle, so that the electrical activity of the atria cannot be transmitted to the ventricles, and the ventricular rate is greater than the atrial rate. 3. Junctional zone interference disconnection: Due to the occurrence of tachyarrhythmia in the junction zone of the atria, the electrical impulse of the atria arrives at the junction zone in the junctional zone should not be in the junctional zone, which results in the interference disconnection of the electrical activity of the heart, and it can not be transmitted to the ventricle. 4. Atrial fibrillation: When atrial fibrillation occurs, the atrial excitation is too fast, the frequency can reach 350~600 times/min, and the protection of atrioventricular node makes these excitations can not reach the ventricle completely. When atrial separation occurs, it is recommended to go to the hospital in time, after clarifying the cause of the disease, to carry out targeted treatment, do not blindly take medication, so as not to aggravate the condition.