Blood Pressure and Heart Rate Guidelines for Children

Blood Pressure Parameters

The American Academy of Pediatrics defines normal blood pressure as below the 90th percentile for age, sex, and height, with elevated blood pressure being systolic or diastolic BP ≥90th percentile but <95th percentile, and hypertension being systolic or diastolic BP ≥95th percentile for age, sex, and height 1, 2, 3
For children 1-10 years, hypotension is defined as systolic BP less than 70 mmHg + (2 × age in years), which equals approximately 74 mmHg for a 2-year-old 4
Blood pressure should be measured with appropriate cuff size—the bladder should encircle 80-100% of the limb circumference, and measurements should be performed with the child seated and relaxed 5, 6, 7

Heart rate at age 3 years ranges from 80-120 beats per minute, providing context for the 2-year-old range 4
Tachycardia may indicate fever, infection, anemia, pain, dehydration, or other underlying conditions, and transient changes during feeding, sleep, or defecation should not be misinterpreted as pathological 8

Elevated BP or hypertension should be confirmed on three separate days before diagnosis, and clinical context and overall condition are more important than isolated measurements 6, 7, 8
Blood pressure should be measured at each routine visit in children with risk factors such as obesity, diabetes, heart disease, or kidney disease, and for healthy children without risk factors, annual screening is appropriate 1, 3, 9