The ideal arterial blood pressure is 130/80 mmHg and the normal blood pressure is 140/90 mmHg. In monitoring blood pressure some people have high blood pressure, sometimes due to a transient increase in blood pressure caused by stress and mood changes in the hospital, called inter-visit blood pressure or white coat blood pressure, this situation does not require stress. The international guidelines currently advocate home blood pressure, that is, in the home blood pressure monitor or electronic blood pressure monitor for blood pressure measurement, when the high pressure can not exceed 135mmHg, low pressure can not exceed 85mmHg, because home blood pressure monitoring can avoid in the hospital due to emotional changes, mood tension caused by blood pressure increase phenomenon, so more advocate home blood pressure.