All of you with MVP, what was your most obvious symptoms? Was it Tachycardia? Was it a feeling of not having enough blood supply in your system when upright with a feeling of no blood/oxygen in the brain? I had Tachycardia for years, I feel like that sometimes/often. My brother had Tachycardia for years, he wore a monitor for a week recently, the doc told him they need to do surgery on a sinus(?) in his heart. I would love to hear from you guys on the board.