Search results

Valve Replacement Forums

Help Support Valve Replacement Forums:

  1. nobog

    New Member

    Pressure and velocity are related. Its like this; lets say your body need to pump 5 liter per minute, so the larger the hole, the less the velocity. When your valve is stenotic, that 5 lpm needs to go through a smaller hole. So the velocity goes up as well as the pressure - remember the 5 lpm...
  2. nobog

    New Member

    I don't know if that's been proven... True, "flow" (at normal pulse rates) has a longer time to go through the mitral valve than the aortic, thus the lower pressure drop.
  3. nobog

    New Member

    Not sure where the dr got that from, the Aortic and Mitral are the high-pressure side of your heart, the Tricuspid and Pulmonary are the low-pressure side.
  4. nobog

    New Member

    "Your mechanical valve should not calcify" It can't, its made of carbon and pencil lead (yup, the inside of a SJM valve is just like a #2 pencil)
  5. nobog

    400 person study on lower INR (1.5-2.5) with mechanical valve

    Angry? If you could give the scientific reason why you need to "test more" with a SJM valve I'm all ears.
  6. nobog

    Staying the Course - Summer Already?

    A "baby" bear on our deck last year, they are usually nocturnal but this was 2 in the afternoon, after our bird feeders.
  7. nobog

    400 person study on lower INR (1.5-2.5) with mechanical valve

    Sorry, that makes no sense whatsoever.
  8. nobog

    Staying the Course - Summer Already?

    Olden Norway, 2 weeks ago. (Travel tip - avoid Heathrow airport if you can :cautious:)
  9. nobog

    Severe Aortic Regurgitation Leading to Second Surgery

    First some terminology - regurgitation is the sum of leakage + backflow. All mechanical valves leak and that is pressure dependent, i.e. there is more leakage at 150mmHg vs 100mmHg. Backflow (leaflets closing) stays about constant. A 31mm valve has much more backflow than a 19mm valve...
  10. nobog

    Severe Aortic Regurgitation Leading to Second Surgery

    First of all, the OnX does not open to 90 deg. in-vivo, even if it did that does not make it better. The SJM valve opens to 84 degrees and if they wanted to they could make it open to 90 deg - and in-vivo it would open that far, but with a larger opening angle comes increased backflow (the...
  11. nobog

    400 person study on lower INR (1.5-2.5) with mechanical valve

    Agree, I took my 90+ father in for INR testing once a month, it was a joke.
  12. nobog

    It makes a clicking sound

    Just a note about Pel's above post, "tad" = tissue annulus diameter, in other words that's the valve size. In general, that's about the middle of the cuff. The On-x is tricky because they only have 4 "carbon" sizes, a 25mm is the exact same valve as a 33mm valve, just a different cuff.
  13. nobog

    My 15 yo daugther - soccer dreams on warfarin

    A mechanical valve should last 100+ years.
  14. nobog

    Trifecta Valve Concerns

    Mechanical valve leaflets may not function satisfactorily at such low pressure (tricuspid / pulmonary) conversely a tissue valve should last longer since the load is significantly reduced. A porcine valve works good for this as the leaflets react well and they seal good at these pressures.
  15. nobog

    Do you measure HRV with a health wearable (watch, Oura ring, Whoop, etc.)?

    By "plummet" if you mean your HRV is low - that's good - that means there is less pulse to pulse variation. So drink up ! Personally I think the entire HRV is some grad student's way of making a technical paper or thesis for a PHD. Of all the parameters of heart (or heart valve) performance...
  16. nobog

    Do you measure HRV with a health wearable (watch, Oura ring, Whoop, etc.)?

    I'll sum it up: HRV = pulse to pulse variation, measured in milliseconds, usually between 20 and 200. This is unique to everyone so it's not like you can say this is low or this is high. A metric not generally used day-to-day. What is HRV? - Healthy Heart Rate Variability & How To Track It...
  17. nobog

    Mechanical Valves vs Saucisse de Toulouse

    EVERYTHING in moderation .....
  18. nobog

    Never told about mother's Mild Aortic Stenosis

    Check out the Conclusion NORMAL AORTIC VALVE VELOCITY RATIO DIFFERS BY RACE AND GENDER | Journal of the American College of Cardiology (jacc.org)
  19. nobog

    Never told about mother's Mild Aortic Stenosis

    "mild aortic stenosis" - it could be like that for months - or decades - before any change. At this point I don't think there is anything to worry about - just monitor the situation. Regards,
  20. nobog

    Got some disturbing news today from a new heart doctor here in Bangkok

    The 1cm (sq) is the area - the bigger the better. It is usually expressed as Effective Orifice Area (look it up). Occasionally it is expressed as geometric opening area - thats simply the size of "the hole". Your # 32 (I believe) is pressure drop (or pressure gradient across the valve) and is...
Top