What is considered hypotensive for patients 1 month - 1 year (infants)?

• A. SBP <70 mmHg
• B. SBP <60 mmHg
• C. SBP <75 mmHg
• D. SBP <65 mmHg

Answer: (A)

In infants aged 1 month to 1 year, hypotension is defined by a systolic blood pressure of less than 70 mmHg. This fixed threshold reflects how perfusion and cardiovascular physiology present in this age group, providing a simple, reliable cutoff for recognizing potential shock regardless of the exact infant age within that range.

So, the value of 70 mmHg is the standard marker for this group. Values like 60, 65, or 75 mmHg don’t align with how guidelines define hypotension in 1 month to 1 year olds, and would not correctly identify or could misclassify perfusion status in this population.