What represents a low normal systolic blood pressure for a 6-year-old child?

For a 6-year-old child, normal systolic blood pressure typically ranges from about 80 to 110 mmHg, with variations based on the child's height and overall health. A low normal systolic blood pressure in this age group would be on the lower end of that spectrum.

The selected response, which indicates 82 mmHg, falls within the acceptable range for a child of this age while being close to the lower limit of normal. It suggests that the child maintains adequate perfusion and is not experiencing hypotension, which can become a concern if blood pressure drops significantly below normal ranges.

For the other readings, 70 mmHg may represent hypotension in a child of this age and could indicate insufficient perfusion. A reading of 90 mmHg is better but still a bit above the most optimal lower range for a 6-year-old, while 100 mmHg is comfortably within the normal range but doesn't reflect the low end. Thus, the choice of 82 mmHg represents the most accurate low normal systolic blood pressure for this age group.