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I'm refreshing on SA node potential and I can't wrap my mind around something. For one why is potassium labeled K+ if it has a cell voltage of -92? Secondly how does potassium leaving the cell drive is back down to phase 0?

Can you be hypovolemic and not be hypotensive? The body is always adapting vessels to match the volume, so couldn't you be normal tensive and still be dehydrated? I had a pt today with dizziness and weakness Bp 146/78 hr 130. 300 cc bolus decreased his hr to 100.

Why?

What's the best way to figure out if the up down down leads 1,2,3 are a left anterior fascicular block or an old inferior wall MI?

IFT of 63 yr female with a ruptured spleen with approx liter and half of blood in her abdomen. BP 84/42. HR 110. On the 3rd bag of RH negative. Now here's where I get confused... Levophed at 15 mcg/min.... Why in the world would you have Levo going?? You are just making them bleed out faster and...

So I had a resp distress call the other day and I was starting an IV. I accidentally cannulated an artery. I decided instead of pulling it out and holding pressure for 5 minutes, to just cap it and let them draw ABGs off it at the ER. Doc didn't have an issue with it and actually said it was a...

So a recent discussion has me thinking a bit. 48 yr male patient who states he has a tearing sensation in his chest. Bp 200/111, Hr 100,RR 22. EKG is normal. You suspect an aortic dissection. You are on an ALS rig. Would you treat the hypertension?

I recently attended a pediatric emergency class through UW Madison. They talked about pediatric seizures and how they won't intervene with drugs unless the seizure goes longer than 5 minutes. That seems like a long time. They just stress keeping airway patent. Has anyone else heared of this?

What exactly causes the ST Elevation from a MI?

http://facebook.com/specwi This is great for staying sharp with your knowledge.

So how much do you think Epi will be effected when given for anaphylaxis in a person who takes Beta Blockers on a regular basis ?

I have been doing research on the Disassociation curve and I have a question. With a right shift caused by acidosis or increased HGB levels you get a decreased SPO2 value with the same PA02 pressure. According to my research this is very efficient at the tissue level because it has a looser...

So I was reading how C02 can play a part in vasoconstriction and dilation. When you breath off too much C02 your smaller vessels constrict. My question is the harmful effects of hypercapnia and can it cause vasodilation? And why does it cause reduced hepatic function.

So you get ROSC and you see a huge influx of C02. How long do you wait to give bicarb if the co2 remains elevated? Or is bicarb over rated and can cause more etc02?

You need glucose to initiate the Kreb cycle.. Right? So wouldn't your CO2 be lower as well? I assume that if your unresponsive in a diabetic coma your C02 might be elevated if your respiration are slow, but with a normal respiratory rate your ETC02 should be lower . Educate me people!

So I had a interfacility transport for a 70 yr female pt who presented to ED with chest pain and left arm pain. Pt had a dual chamber pacemaker with nothing remarkable on EKG. Pt has negative cardiac enzymes as well. We were called to transport her for a exploratory cath. Upon our arrival she...

Do you think a significant GI bleed or any hypovolemic state would effect your capnography in the early stages?

I was reading some information on the Kreb cycle to refresh my memory. I read that fat gives off way more energy when metabolized then glucose. This doesn't make sense to me because when a person is in DKA they are burning fat to create energy and it is very inefficient and leads to a dangerous...

I am doing a training in August on Capnography. This training will be for all skill levels, so I want to make it fun and interactive. We have the zoll with cap and side stream attachment. Any ideas on interactive ways to teach this subject?