High blood pressure is more harmful to the heart, as follows: 1. Because of high blood pressure itself for the heart is an increased load, especially for the left ventricle. The left ventricle pumps blood from the heart to the aorta, which is then used by various organs and organs throughout the body. The emergence of muscle hypertrophy compensation can overcome the load brought about by high blood pressure in the heart, which is beneficial at the beginning, and as the load increases, eventually there will be a loss of compensation and heart failure will occur, which is the direct damage of hypertension to the heart; 2. Due to long-term elevated blood pressure, it can lead to atherosclerosis in various arteries throughout the body. For the heart, if it leads to hardening of the arteries of the heart vessels, called coronary atherosclerosis, which will then induce coronary heart disease, clinical can appear angina pectoris, myocardial ischemia, myocardial infarction and other serious complications, so hypertension is more harmful to the heart.