What is the left deviation of ECG axis? Does it affect your health?

It shows that left ventricular hypertrophy is common in hypertension, cardiomyopathy, coronary heart disease, congenital heart disease, rheumatic heart disease, diabetes and so on. If blood pressure and myocardial enzymes (serum biochemical tests) are normal, and some people don't feel sick, they will be fine. Observe blood pressure more at ordinary times, and don't exercise vigorously.