ECG findings include normal ECGs as well as abnormal ECGs, the latter including atrial abnormalities, ventricular abnormalities, junctional abnormalities, and sinus abnormalities. 1. Atrial abnormalities, mainly atrial flutter, atrial fibrillation, atrial pre-systole, and atrial tachycardia. 2. Ventricular abnormalities, including ventricular hypercardia, ventricular pre-systole, ventricular fibrillation, ventricular flutter, intraventricular block and bundle branch block. 3. Junctional abnormalities, including atrioventricular junctional premature beats, atrioventricular junctional regional escape beats and rhythms, nonparoxysmal atrioventricular junctional tachycardia, atrioventricular junctional-related refractory tachycardia, and atrioventricular conduction block. 4. sinus abnormalities, including sinus tachycardia, sinus bradycardia, sinus arrest, sinus block, and sick sinus node syndrome. 5. Normal ECG, including normal P wave, QRS wave, ST segment and T wave. If there is any abnormality in ECG, consult the cardiology department in time for active diagnosis and treatment.