What exactly is "rapid squatting" (in First Aid)? I understand how "squatting" increases afterload, but FA says "rapid squatting" increases preload.
Squatting rapidly is like a one way ticket to snap city.
Really though, I have no idea what FA is talking about with this either and would love to know if it is a variation of the standard squat (30 sec then rapid stand).
Yea so ti increases Both afterload and preload
Afterload as you know due to increase systemic vascular resistance from constriction of the femoral artery which reverses the shunt to L to R.
Preload becuase the reversal of the shunt to L to R eventually increases LVEDP AND LVEDV which are both parameters of preload.
wouldn't look to much into it tho. I just think knowing that afterload is increased and the method behind it is important.
I think more importantly you should know that Tetralogy of fallot, Truncus arteriosus and Transpostion of the great vessels are all due to failure of neural crest cell migration. They love that ish.
Just get an echo.Thanks. I'm asking regarding how it relates to murmurs.
So "squatting" is like a one time deal? Tell the patient to squat down and, while they're squatting, you listen and MR will get louder but MVP will get softer.
"Rapid squatting" involves the patient quickly doing several squats and then you listen and their AS murmur will get louder?
I understand all the starling stuff etc, but I can't wrap my head around how exactly you do a "rapid squatting" thing at the bedside lol.