Home blood pressure has been recognized as a prognostic predictor for cardiovascular events, and integrated into the diagnosis and management of hypertension. Most clinical studies derived home blood pressure estimates from the averages of morning and evening home blood pressure readings separately over varying periods of time. For evaluating the timing and number per occasion for blood pressure measurement, several clinical trials could be taken into consideration. The more measurements taken, the more precise blood pressure estimates are, at expense of time consumed.
　　The “2020 Consensus Statement of the Taiwan Hypertension Society and the Taiwan Society of Cardiology on Home Blood Pressure Monitoring for the Management of Arterial Hypertension” has recommended to measure home blood pressure for 7 consecutive days, in 2 occasions (in the morning and in the evening) per day, and 2 readings, 1 minute apart, in one occasion (the "722" principle). The 722 principle should be applied in the confirmation of hypertension diagnosis and 2 weeks after adjustment of antihypertensive medications. In uncontrolled hypertensive patients, HBP monitoring should be performed following the 722 principle at least monthly. In well-controlled hypertensive patients, home blood pressure monitoring could be performed at least once weekly, or following the 722 principle at least every 3 months.
　　It is reasonable to conclude that the “722” protocol for HBP monitoring is clinically justified and can serve as a basis for standardized HBP monitoring.