Left ventricular high voltage is defined as ECG RV5+SV1>4.0mV (men) or 3.5mV (women). Left ventricular high voltage caused by chest wall hypertrophy and electrode position movement can be self-cured, and left ventricular high voltage caused by hypertension and other diseases cannot be self-cured and can be treated medically. Chest wall hypertrophy and shifting of the chest lead electrode position during examination can lead to high LV voltage on ECG, which can be normalized after weight loss or re-examination. Certain diseases, such as hypertension, mitral valve insufficiency, and hypertrophic cardiomyopathy, can cause left ventricular hypertrophy, resulting in high left ventricular voltage. These conditions are not self-healing and require medication. Drugs such as spironolactone, Benadryl, metoprolol, etc. can be used to inhibit ventricular remodeling and slow down the progression of the disease. When high voltage in the left ventricle occurs, it is important to consult a doctor and choose the appropriate treatment after examination and evaluation by a doctor in order to avoid delaying the condition.