Under normal conditions, the rhythm of the heart is transmitted from the sinus node and is called sinus rhythm. A sinus heart rate of 60-100 beats/min is generally normal. In contrast, the ectopic excitation points below the sinus node, including the atrioventricular node, atrial and ventricular rhythms, and the excitation coming from the atrioventricular node are called atrioventricular node rhythms. Atrioventricular node rhythm is an ectopic rhythm, which is often found in atrial or sinus rhythm, bradycardia followed by ectopic pacing point excitation, or in atrioventricular block or sick atrioventricular node syndrome, where the sinus node is not functioning or the ectopic pacing points in the atria are not able to generate excitation impulses. These rhythms are usually between 40-60 beats/minute and are diagnosed on the electrocardiogram as a type of arrhythmia. If atrioventricular nodal rhythms are present, the patient should go to the hospital in a timely manner to find the cause of the atrioventricular nodal rhythm. Most of the atrioventricular nodal rhythms are due to intra-atrial conduction block and various pathological factors, and the patient may experience dizziness, chest tightness, chest pain, etc.