What blood pressure range indicates pre-hypertension?

Pre-hypertension, as defined by the American Heart Association, is characterized by blood pressure readings that fall in a specific range. The correct answer indicates that pre-hypertension is when systolic blood pressure is between 120 and 139 mm Hg and diastolic blood pressure is between 80 and 89 mm Hg. This range signifies that the individual is at risk of developing hypertension, which necessitates monitoring and potentially adjusting lifestyle or medical interventions to prevent progression to higher blood pressure categories.

The first choice reflects normal blood pressure, which is considered healthy and does not indicate any risk of hypertension. The third choice describes stage 1 hypertension, which is above the threshold for pre-hypertension. The fourth choice is misleading as "under 140/80" could suggest various readings, but it does not accurately define the pre-hypertension range. Hence, the correct designation for pre-hypertension aligns with the specific criteria established in medical guidelines.