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PVCs and floppy mitral valve
Did your doctor ever tell you about Mitral Valve Prolapse (Floppy mitral valve)? Mitral valve prolapse (MVP) is a relatively frequent valvular abnormality. Various causes have been cited for the occurrence of ventricular arrhythmias, mechanical stimulation (=irritation) of the heart by the mitral valve leaflets, abnormal innervation of floppy mitral valve and so on. You can read more about it here:
Treatment is mostly with Beta blockers to reduce the frequency of the PVCs, or with valve repair if the valve leaks badly enough.
From the unpredictable nature of your PVCs, I wonder whether you can relate their occurrence to the position you (and thus your heart) are in when they start? If these PVCs are caused (not at all a proven hypothesis) when a leaflet hits the inside of your heart, I wonder whether you help yourself avoiding that position (such as "don't stand on your head, if that causes the problem").
In the meantime, these rhythms can be very uncomfortable!
Hope this helps a little. I am afraid that other than taking Beta blockers and avoiding stress, caffeine etc. there is not much that can be done other than to reassure you are not in danger. To assure you are not alone, there are many support groups for MVP!
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