Which statement about STEMI limb-lead criteria is true?

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Multiple Choice

Which statement about STEMI limb-lead criteria is true?

Limb-lead STEMI criteria focus on the pattern seen in the limb electrodes. The correct standard is ST-segment elevation of at least 1 mm in two contiguous limb leads, such as II and III or aVF and III. Requiring two adjacent limb leads confirms a regional injury pattern corresponding to a coronary territory and helps avoid false positives from isolated changes. Elevation in a single limb lead, even if 2 mm, does not meet the limb-lead criterion. ST depression in limb leads isn’t a STEMI criterion, and while STEMI can involve chest leads, the limb-lead criterion specifically requires two contiguous limb leads with elevation; elevation only in chest leads would not satisfy the limb-lead rule.

Limb-lead STEMI criteria focus on the pattern seen in the limb electrodes. The correct standard is ST-segment elevation of at least 1 mm in two contiguous limb leads, such as II and III or aVF and III. Requiring two adjacent limb leads confirms a regional injury pattern corresponding to a coronary territory and helps avoid false positives from isolated changes. Elevation in a single limb lead, even if 2 mm, does not meet the limb-lead criterion. ST depression in limb leads isn’t a STEMI criterion, and while STEMI can involve chest leads, the limb-lead criterion specifically requires two contiguous limb leads with elevation; elevation only in chest leads would not satisfy the limb-lead rule.

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