Our expert says:
Glad to hear from you again, but sorry that you are having some problems.
From what you say, the most likely scenario is as follows. You are on Sotahexal, and you may be experiencing some of the known side effects. However, if this happens only when you exercise, then it is more likely that the cause of your problem is the pacemaker. No, it is NOT malfunctioning. Remember that the Sotahexal will tend to slow your heart rate down if it tries to rise, and, also, your pacemaker ( if it is the usual kind) is set at a certain speed. What this boils down to is that your heart is unable to respond normally to exercise : the heart rate should rise during exercise, to raise the heart output enough to meet the oxygen demands of the muscles being used( and that includes the heart muscle itsself! ), and you may no longer be able to do this, because of your pacemaker. You need to speak to your cardiologist about this possibility : perhaps you have one of the more sophisticated pacemakers which are able to respond to exercise demands. If that is the case, then something else is going on, and he will need to re-assess your medication.
Of course, this could just be due to your having missed a few doses of your medication. This too, your cardiologist will be able to sort out.
I hope you can get this sorted out. Please let me know what your cardiologist says. Meanwhile, keep to your prescribed dose, and avoid any strenuous exercise until you have seen him.
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