An ECG shows ST depression in leads V5-V6 in a patient with angina. Which coronary artery is most likely involved?
- Correct Answer: Left circumflex artery (LCx)
- Right coronary artery (RCA)
- Left anterior descending (LAD)
- Posterior descending artery (PDA)
Explanation: LCx occlusion causes ST depression in lateral leads (V5-V6).
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