squatting

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Prep4USMLE Forum » USMLE Step 2 CK Forum » Internal Medicine Forum

squatting

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4 Posts

rei
Forum Elite

Topics: 67
Posts: 126

10/06/06 - 03:20 AM

i read that
squatting
--> increases systemic vascular resistance
--> increases systemic BP
--> decreases right to left shunt
--> decreases cyanosis

how does increase in systemic blood pressure leads to decrease in right to left shunt?

thx

Renegade
Forum Elite

Topics: 18
Posts: 171

10/06/06 - 07:06 AM

Just reasoning here... won't increase in systemic pressure also increase pressure inside LV through augmented afterload? That should decrease right to left shunt.

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study_ing
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Topics: 180
Posts: 2,509

10/06/06 - 09:04 AM

a rt to left shunt happens whenthere is

a) a pathway allowing mixing of blood from rt to left

b) a pressure gradient with rt sided pressures> lt..the larger this is, the greater the shunt.

squatting wud increase the lt sided pressure and decrease the gradient for the shunt.

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rei
Forum Elite

Topics: 67
Posts: 126

10/06/06 - 09:43 PM

thank you very much. Your explanation is very clear and helpful nod

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