I'm a 36 year old with a single chamber atrial pacemaker that was put in 10 years ago after having several sinus node ablations that left me with a very slow heart rate. I have been doing very well with the pacemaker until I started having bad headaches, jaw pain and fatigue over the past few months. I had a pacemaker check in August which showed three episodes of tachycardia with heart rates in the 240's. I have had an event monitor which showed sinus tachycardia and junctional rhythm. The cardiologist said that the atria and ventricles are beating out of sync. I have tried taking toprol XML 50 mg once a day, but the medicine makes me feel very tired and mentally foggy. I hate taking it, but when I don't the headaches, jaw pain pounding in my chest and neck area start. Does pacemaker syndrome happen with atrial pacemakers? I sought a second opinion for this and he did mention pacemaker syndrome. I have a structurally normal heart.
Single lead atrial pacemakers are extremely rare. Generally most pacemakers (single lead) is implanted in right ventricle. But, sinus node dysfunction in a young individual is an indication for atrial pacing.
Pacemaker syndrome generally does not happen with single chamber pacemakers and hence it is unlikely in your case.
What is certainly possible that your pacemaker has erroneous sensing and for some reason is firing unnecessarily- rather uncommon: the pacemaker check would have picked that up.
I think it is likely to be some form of atrial tachycardia and can be easily controlled with medications.
There are a lot of options besides metoprolol and you should certainly talk to your cardiologist about those since you do not tolerate metoprolol.
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