Which leads reflect ischemic changes in the right coronary artery?

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Prepare for the Emergency Nursing Orientation 3.0 Cardiovascular Emergencies Test. Use interactive flashcards and detailed explanations with multiple choice questions. Enhance your understanding of cardiovascular emergencies and succeed on your exam!

Multiple Choice

Which leads reflect ischemic changes in the right coronary artery?

Explanation:
Inferior-wall ischemia from RCA occlusion shows ST elevation in the inferior leads: II, III, and aVF. The right coronary artery typically supplies the inferior portion of the left ventricle, so injury currents appear best in these leads. The lateral leads (I, aVL, V5, V6) reflect the lateral wall (often from the left circumflex), not the inferior wall. The anterior/septal leads (V1–V4) reflect LAD territory, not RCA. An isolated pattern in III or aVR alone isn’t the classic sign of RCA inferior infarct, since aVR elevation typically indicates different patterns like diffuse ischemia or left main involvement.

Inferior-wall ischemia from RCA occlusion shows ST elevation in the inferior leads: II, III, and aVF. The right coronary artery typically supplies the inferior portion of the left ventricle, so injury currents appear best in these leads. The lateral leads (I, aVL, V5, V6) reflect the lateral wall (often from the left circumflex), not the inferior wall. The anterior/septal leads (V1–V4) reflect LAD territory, not RCA. An isolated pattern in III or aVR alone isn’t the classic sign of RCA inferior infarct, since aVR elevation typically indicates different patterns like diffuse ischemia or left main involvement.

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