Blood Pressure Monitoring Guidelines
Introduction to Blood Pressure Measurement
- The American College of Cardiology recommends that blood pressure should be based on an average of at least 2 readings obtained on at least 2 separate occasions, and out-of-office measurements are essential to confirm the diagnosis and guide treatment decisions 1
Office Blood Pressure Measurement Technique
- Proper measurement technique is fundamental to accurate blood pressure categorization and risk assessment, according to the American College of Cardiology, and includes ensuring the patient is seated quietly for at least 5 minutes before measurement, with back supported, feet flat on the floor, and arm supported at heart level 1, 2
- The American College of Cardiology recommends obtaining at least 2 readings at each visit, 1 minute apart, and using validated, calibrated devices with appropriate cuff size 1, 2
Out-of-Office Blood Pressure Monitoring Parameters
- The American College of Cardiology recommends home blood pressure monitoring to confirm hypertension diagnosis and titrate medications, with readings taken at least 2 times, 1 minute apart, both in the morning and evening 1, 2, 3
- The American Heart Association suggests that home blood pressure monitoring should be done daily, ideally for at least 1 week, and begin 2 weeks after treatment changes and during the week before clinic visits 3
- The American College of Cardiology recommends that ambulatory blood pressure monitoring provides the most accurate cardiovascular risk assessment and should be used to detect white coat and masked hypertension, with daytime threshold of ≥135/85 mmHg, nighttime threshold of ≥120/70 mmHg, and 24-hour threshold of ≥130/80 mmHg 1, 2, 3, 4
Blood Pressure Classification Categories
- The American Heart Association categorizes blood pressure using the following thresholds: normal (<120/80 mmHg), elevated (120-129/80 mmHg), stage 1 hypertension (130-139/80-89 mmHg), and stage 2 hypertension (≥140/≥90 mmHg) 5, 6
Screening for White Coat and Masked Hypertension
- The American College of Cardiology recommends screening for white coat hypertension with ambulatory blood pressure monitoring or home blood pressure monitoring when office blood pressure is 130-159/80-99 mmHg, and screening for masked hypertension with home blood pressure monitoring or ambulatory blood pressure monitoring when office blood pressure is 120-129/75-79 mmHg, especially in high-risk patients 1, 2, 3, 4