Right atrial hypertrophy can be diagnosed by cardiac vectorgram and electrocardiogram. 1. Cardiac vectorgram: In right atrial hypertrophy, the main change of P vector ring is that the ring body is significantly enlarged to the right anteriorly and inferiorly. In the transverse plane, the main change of the P-ring is an increase in anterior direction, and the maximal vector of the P-ring is nearly parallel to the direction of the V1 and V2 lead axes, and nearly perpendicular to the direction of the V5 and V6 lead axes. 2. Electrocardiogram: The electrocardiogram will have the following index changes in right atrial hypertrophy. (1) PII, III, AVF ≥ 0.25mV, PV1, V2 ≥ 0.15mV. (2) Rightward deviation of the P electrical axis, +75° to +90°. (3) P-wave duration is not prolonged. (4) V1 lead R/S>1 (no right bundle branch block). If the index of V1 lead R/S>1 is added, the specificity of the above diagnostic indexes can be significantly increased. It is recommended that patients with right atrial hypertrophy seek timely medical attention, clarify the cause of the disease under the guidance of the doctor, and actively treat it.