A 65-year-old man experiences crushing substernal chest pain and is brought to the emergency room. ECG shows ST-segment elevation in leads V2, V3, and V4. A coronary stent is placed and blood flow restored. Two hours later, he develops a wide-complex tachycardia. Which of the following is the most likely explanation for his abnormal rhythm?
Decreased free radical scavenging
Generation of reactive oxygen species
Incomplete restoration of left circumflex artery blood flow
Increased free radical scavenging
Lipid acetylation
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Cut-to-the-chase Answer (0:46):
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HY USMLE Answer (2:16):
