American Association of Critical-Care Nurses (AACN) Certification Practice Test

What is considered normal blood pressure?

1. 100-140/70-90

2. 90-120/60-80

3. 120-140/80-90

4. 80-100/50-70

The correct answer is: 90-120/60-80

Normal blood pressure is typically defined as a systolic reading (the first number) of less than 120 mmHg and a diastolic reading (the second number) of less than 80 mmHg. Therefore, the range of 90-120/60-80 is consistent with these guidelines, making it the correct choice. This definition comes from the American Heart Association, which classifies blood pressure ranges for adults to help healthcare professionals assess cardiovascular health. A systolic pressure of 90 mmHg is at the lower end but still considered normal, while a diastolic pressure of 60 mmHg is also within the normal range. Other options provided do not fall within this recognized normal range. For instance, the ranges that include readings above 120 systolic or above 80 diastolic indicate higher blood pressure levels that may fall into categories of elevated blood pressure or hypertension, which are not considered normal. Therefore, the correct answer reflects the accepted standard for normal blood pressure readings.