Harvard Heart Letter

What is long QT syndrome?

Ask the doctor Q. I was recently diagnosed with long QT syndrome, which was apparently caused by a medication I was taking. But I understand that there are also genetic causes for this problem. Can you tell me more about this disorder? A. Long QT syndrome is a rare disorder of the heartís electrical system. Electrical signals coordinate your heartbeat, telling the heart to contract and relax to pump blood.…

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