Characteristics of the atrial escape ECG include: 1. delayed appearance of 1 or 2 atrial escape P′ waves after a long interval, with a morphology different from that of sinus P. The P-R interval is usually mildly prolonged greater than 0.12 s. The P′-R interval is usually slightly longer than 0.12 s. The P′-R interval is usually slightly shorter than the sinus P-R interval. 2. The P′-R interval is greater than 0.12 s or slightly shorter than the sinus P-R interval. 3. The QRS-T wave cluster is identical to that of sinus beats. 4. Because atrial escape beats are passive rhythms, they must be delayed after a long interval. 5. Usually, the length of the atrial escape cycle is 1.0-1.2 s, and the frequency is 50-60 beats/min. 6. The morphology of the QRS-T waves downstream of the atrial escape beat is the same as that of sinus rhythm. 7. Lack of afferent block: once the sinus heart rate >60 beats/min, the pacing point of atrial escape beats is inhibited. If atrial escape rhythm is found, it is recommended to go to the hospital as soon as possible for consultation and treatment under the guidance of the doctor.