Maybe I did not mention Valsalva maneuver during your MRV
I had problem with my valve as well.
Dr. Zamboni mentions Valsalva in his study. I had to do Valsalva maneuver during my MRV more times - you stop your breath and you must push your air down into your belly. It can make you little bit dizzy after couple of times. They always tell you when you may start to breathe again.
I do not know if you do it in the USA while your MRV, moreover Haacke`s protocol is important!
Aug. 7, 09 Doppler Ultras. in Poland, left Jugul. valve problem, RRMS since 1996, now SPMS,
- Nov.3,09: one stent in the left jug. vein in Katowice, Poland, LDN, never on DMDs
- Jan. 19, 11: control venography in Katowice - negative but I feel worse