13:30 I don't understand how massive vasoconstriction is a sensible response to shock. How would blood flow increase with narrowing of the blood vessels?
Here’s an equation to help you understand, CO= MAPx SVR (TPR) where MAP is mean arterial pressure, and svr is systemic vascular resistance. So when SVR goes up, CO goes up too. Now a reason for this is actually simple. Your CO is low, which means you have less blood being pumped out per cycle. So your body does what we call peripheral vasoconstriction ( an example is just like in this video, your vessels in your extremities clamp down) and while this is happening, your body also vasodilates the vessels going to your major organs like your brain and your heart. What happens here, is that the increased resistance in the peripheral regions diverts blood away from “less important organs for survival” to prioritize keeping your “more important organs” like your brain and heart alive (know that your brain and heart aren’t the only ones receiving increased flow). This is a normal physiologic response to shock or hypoxia.
Can long term heart failure with reduced EF cause PAD like symptoms when ankle brachial index and bilateral lower extremity ultrasound results are normal? Tingling and coldness from toes to ball of both feet. The temperature differential causes a clammy sole in that area.
@@muqtarjamaegal6071 Oxygen level appear to be normal. Podiatrist and tech doing ultrasound mention diabetic neuropathy, but sensitivity is normal, and the cold feet can be measured. Possibly getting referral to vascular surgeon.
So excited for all of these videos dropping today ! I have an exam tomorrow and this is one of the topics
shoutout to rob for controlling his LDL
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Acute Limb Ischemia... its House!! 😄
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13:30 I don't understand how massive vasoconstriction is a sensible response to shock. How would blood flow increase with narrowing of the blood vessels?
Here’s an equation to help you understand, CO= MAPx SVR (TPR) where MAP is mean arterial pressure, and svr is systemic vascular resistance.
So when SVR goes up, CO goes up too.
Now a reason for this is actually simple. Your CO is low, which means you have less blood being pumped out per cycle. So your body does what we call peripheral vasoconstriction ( an example is just like in this video, your vessels in your extremities clamp down) and while this is happening, your body also vasodilates the vessels going to your major organs like your brain and your heart. What happens here, is that the increased resistance in the peripheral regions diverts blood away from “less important organs for survival” to prioritize keeping your “more important organs” like your brain and heart alive (know that your brain and heart aren’t the only ones receiving increased flow).
This is a normal physiologic response to shock or hypoxia.
Can long term heart failure with reduced EF cause PAD like symptoms when ankle brachial index and bilateral lower extremity ultrasound results are normal? Tingling and coldness from toes to ball of both feet. The temperature differential causes a clammy sole in that area.
May be low low oxygen and blood can cause lower legs to became cold and cyanotic
@@muqtarjamaegal6071 Oxygen level appear to be normal. Podiatrist and tech doing ultrasound mention diabetic neuropathy, but sensitivity is normal, and the cold feet can be measured. Possibly getting referral to vascular surgeon.
What is diffuse minimal plaque or scattered minimal plaque mean on a duplex ultrasound? I’m a 54 year old female.
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35:51 i demand whiteboard
Buerger’s sign
Austrian American physician Leo Buerger
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Thank you