all 20 comments

sorted by: hot top controversial new old
[–] 69 points 1 month ago (6 children)
  • [–] 10 points 1 month ago

    Funfact, VADs often still have a small pulsatile change, e.g. 2 seconds at 5000rpm, 2 seconds at 5400, so there is a difference it's just not palpable. The body seems to adjust better to this slight variatons instead of a continuous flow.

  • source
  • parent
  • [–] 31 points 1 month ago (4 children)

    My pulse is zero around 50 times a minute, it's all down to sample length

  • source
  • hideshow 4 child comments
  • [–] 9 points 1 month ago (3 children)

    Is this a Nyquist Theorem reference?

  • source
  • parent
  • hideshow 3 child comments
  • [–] 3 points 1 month ago (2 children)

    I wish I was smart enough to know what that was, I was just being a contrarian asshole for the fun of it

  • source
  • parent
  • hideshow 2 child comments
  • [–] 2 points 1 month ago (1 child)

    fs≥2fm

    Basically you need instruments to be at least twice as fast to sample a continuous signal. This has to do with digitizing an analog signal. If you are not sampling it that fast then you are folding the signal back on itself, sometimes refereed to as aliasing. Im a flunky so don't take my tldr to seriously.

  • source
  • parent
  • hideshow 1 child comment
  • [–] 8 points 1 month ago

    There was a man hooked up to an artificial heart for an extended period of time. He had no pulse. I'm sure he tried to feel for it as anyone would in that situation.

    This sub needs better moderation.

  • source
  • [–] 7 points 1 month ago (1 child)

    What about that man that woke up dead

  • source
  • hideshow 1 child comment
  • [–] 5 points 1 month ago

    Dick Cheney?

  • source
  • [–] 7 points 1 month ago

    Charlie Kirk did

  • source
  • [–] 3 points 1 month ago (1 child)

    You can technically remain conscious and in control of your body for a few seconds after your heart stops, while there's still enough oxygen in your brain and muscles. So there's nothing theoretically stopping this from happening. I don't know if this has happened at any point, but I wouldn't be surprised if it did.

  • source
  • hideshow 1 child comment
  • [–] 5 points 1 month ago

    I've heard of this happening with electricians. They'll touch something energized, check their pulse, then sit down and ask somebody close by "can you call 911 and start doing cpr on me?" Before passing out.

  • source
  • parent
  • [–] 3 points 1 month ago

    Well, probably not more than once anyway.

  • source