In ECG of patients with chronic pulmonary heart disease, the frequent waveforms are rightward deviation of the electrical axis, severe cis-clockwise transposition, and pulmonary-type P wave. In chronic pulmonary heart disease, due to the increase of pulmonary vascular resistance and the increase of pulmonary artery pressure, the right deviation of the electrical axis, severe cis-clockwise transposition, and pulmonary P-wave, etc., can reflect the right ventricular hypertrophy due to the pulmonary arterial hypertension. Right ventricular hypertrophy is mainly manifested in the electrocardiogram as electrical axis ≥ +90°, V1R/S ≥ 1, V5R/S ≤ 1, RV1+SV5 ≥ 1.05mv, aVR R/S or R/Q ≥ 1, V1-V3 presenting QS or Qr, and pulmonary-type P waves. If you are considered to have chronic pulmonary heart disease in daily life, it is recommended to go to a regular hospital to avoid delay.