Question

the top number on a blood pressure reading is ____________? asystolic systolic diastolic

Explanation:

Blood pressure has two components. The top number is systolic, which measures pressure when the heart beats. The bottom number is diastolic, measuring pressure when the heart rests between beats. "Asystolic" refers to absence of heart contractions (not a normal reading component). So the top number is systolic.

Answer:

B. Systolic