Patient's Query
Hi doctor,
I am a 35-year-old male currently taking Methadone for chronic pain. I have experienced PVC (premature ventricular contraction), and my last EKG indicated a prolonged QT interval of over 500 ms. My doctor recommended that I take Magnesium and Potassium supplements, as he believes that Methadone may be lowering my magnesium and potassium levels. It has been a week since I started this regimen, and my PVC has nearly resolved. Unfortunately, I cannot reduce my Methadone dosage due to my injury.
The doctor suggested that I consult a cardiologist to determine whether I might need a beta blocker. He wants to see how the supplementation works out first. Do you have any advice for me? I have an EKG done twice a year.
Hi,
Welcome to icliniq.com.
I have reviewed your explanation in detail, and I understand your concerns.
Long QT syndrome can predispose you to a potentially fatal arrhythmia known as torsades de pointes. In your case, I strongly recommend starting treatment with a beta blocker, as this is a safer option. The absence of PVC (premature ventricular contractions) does not eliminate your risk of a major cardiac event. Often, patients in similar situations do not present any symptoms, and we only become aware of issues when a significant event occurs. I encourage you to discuss the possibility of alternative pain medications with your physician to see if a safer option can be prescribed. In the meantime, you will need a beta blocker, and Propranolol would be a good choice. Please schedule a follow-up EKG (electrocardiogram) at least two weeks after starting the beta blocker.
Best regards.
Patient's Query
Hi doctor,
Thank you for the reply.
I spoke with my doctor, and he prescribed Propranolol. He believes my PVCs are benign because I have not fainted or passed out, and I do not have a family history of these issues. I cannot discontinue the Methadone because I go to a clinic where it is the only medication they dispense. Will the beta blocker keep me safe? I have never experienced fast heartbeats or torsades de pointes before. My PVCs consist of a pause, followed by a flip-flop, and then another pause. They usually resolve when I stand up or when my anxiety decreases.
Hi,
Welcome back to icliniq.com.
Yes, what you are experiencing is likely due to the use of Methadone, which can predispose you to torsades de pointes. If you were to stop taking Methadone, the long QT interval would typically resolve. However, since you must continue using Methadone, I recommend that you keep taking Magnesium and Potassium supplements along with the beta blockers. That said, this is not a 100 percent guarantee of safety. You need to be under continuous supervision from your physician, and your electrolyte levels should be regularly monitored alongside your ECG.
If the QT interval continues to increase over time, a decision may need to be made to discontinue Methadone to prevent the risk of sudden cardiac death. While this condition can also be influenced by family history, that does not apply in your case. I sincerely wish you a swift recovery.
Thank you.
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Answered byDr. Isaac Gana
Medically reviewed byDr. K. Shobana
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