Blood pressure categories and measurement errors

The CCMA does not ask you to interpret a blood pressure clinically — it asks you to classify it correctly and to know which readings stop the appointment. Nearly every miss on this topic is a boundary error, because the categories share their edges and one of them uses AND where the others use OR.

Normal	Under 120 systolic AND under 80 diastolic (2017 ACC/AHA)
Elevated	120 to 129 systolic AND under 80 diastolic — this is the only category joined by AND, and it is the one candidates get wrong
Stage 1 hypertension	130 to 139 systolic OR 80 to 89 diastolic
Stage 2 hypertension	140 or higher systolic OR 90 or higher diastolic. A reading of 146/92 meets both halves
Hypertensive emergency	Above 180/120 with symptoms such as chest pain or vision changes. The American Heart Association directs that care not be delayed — the medical assistant alerts the provider immediately rather than rechecking and waiting
The DASH sodium number	2,300 mg per day, and NHLBI notes 1,500 mg lowers pressure further
The DASH number that is not sodium	4,700 mg is the daily POTASSIUM target. Swapping these two is one of the most reliable distractor pairs in this domain
Why a single high reading is not a diagnosis	Classification uses the average of readings on separate occasions; the medical assistant reports what was measured and does not diagnose

Where the point is lost: Learn the four bands as boundaries and note which conjunction each uses. Elevated is the trap: 126 over 78 is elevated, but 126 over 82 is stage 1, because the diastolic crossed 80 even though the systolic never moved out of the 120s.