Dec 4, 2022
Pharmacology Antiarrhythmics Mnemonic
In this video, we go over a mnemonic to help you remember the five Vaugh-Williams classifications of antiarrhythmic medications.
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In this chapter, we begin our dive into Cardiac System pharmacology. You can find all the respiratory episodes here at https://www.memorizingpharm.com/oer6
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Auto Generated Transcript:
Welcome to the Memorizing Pharmacology Podcast. I’m Tony Guerra, pharmacist and author of the Memorizing Pharmacology book series, bringing you mnemonics, cases, and advice for succeeding in Pharmacology. Sign up for the email list at memorizingfarm.com to get your free suffixes cheat sheet or find our mobile friendly self-paced online pharmacology review course at residency.teachable.com forward slash P forward slash mobile. Let’s get started with the show.
Hey, welcome to the Memorizing Pharmacology Podcast. I’m excited to talk to you a little bit about the cardiac section. So what we’re going to do is we’re going to do an interactive activity with the antiarrhythmics and I think it gets a little bit confusing when we talk about them but we have class one which is the n a or sodium blockers and then we have well fast sodium channel blockers we have within that one a one B one C so procainamide uh lidocaine and phenytoin in one b and then flecanide in one C then we have the two which is the beta blockers but we can have you know the first gens which are like Propranolol second gen metoprolol and third gen Carvedilol uh we kind of moved down to class three which is amiodarone and then class four would be the Verapamil and deltaizum so the amiodarone is going to be a potassium blocking and then the calcium channel blockers are going to be the Verapamil and deltaism so one two three and four and then five we’ll talk a little bit about adenosine uh in a second here.
Now what we’re going to do is we’re going to go over the antiarrhythmic agents or sometimes called the anti-disrhythmic agents and what we’re going to do is we’re going to just do a little matching here but what I want to give you is a bit of a mnemonic that can help you remember which class goes with which medication and the mnemonic is Nab K C A so NAB for sodium and a and the B for beta blocker and it may help if you do NAB and ABB that may help you even more and then k for potassium blocker or potassium channel blocker really and then C A for calcium channel blocker and then the last one is adenosine for five so this comes from the Vaughn Williams classification.
And you’ll be told about the Roman numerals from a numeral one which looks like an i which is class one uh class two is two eyes class three is three eyes class four is an i with a V and class five is a v by itself so what we’re going to be going over and I’m not going to answer these in the order that they’re in I’m going to go class 1 Class 2 class 3 class 4 and then adenosine class five because what I want for you to do is to remember it using this mnemonic so class one what we’re looking for is the word sodium or n a in one of the answers.
So here are the answer choices. And I know they’re a little bit long but I just want to read them so that you can hear how kind of jumbled it is when you just try to read them without having any mnemonic or anything uh first one is medications prolonged repolarization by blocking the potassium channels in cardiac cells that are responsible for repolarization number two says anti-disrhythmic medications slow conduction and prolonged depolarization by decreasing sodium influx into cardiac cells medications increase the refractory period of the AV node by slowing the influx Flux Of calcium ions thus decreasing the ventricular response and decreasing the heart rate medications are beta blockers that are used to decrease conduction velocity automaticity and the refractory period of the cardiac conduction cycle.
And then a unique medication given to patients who are experiencing paroxysmal supraventricular tachycardia okay so our keywords were potassium sodium calcium beta blocker and then medication so now let’s use our mnemonic our NAB K C A so the N A from NAB would be class one okay. And we saw that it was this answer anti-disrhythmic medication slow conduction and prolonged depolarization by decreasing sodium influx into cardiac cell so one is na in NAB class one Class 2 are beta blockers two B’s okay so n a b b medications are beta blockers that are used to decrease conduction velocity automaticity.
And refractory period of cardiac conduction cycle class three was K so again it’s NAB KCA so little bit tricky here because potassium when you look at periodic table it K calium it synonym potassium potassium comes from pot ash uh which where this comes from let’s put that class 3 there medications prolonged repolarization by blocking potassium channels in cardiac cells responsible repolarization class four medications okay we’re going match this increase refractory period AV node by slowing influx calcium ions RCA thus decreasing ventricular response decreasing heart rate but also use as class 5 which adenosine okay check okay see they’re all right.
So again going from one we have our sodium which was our n a from periodic table again that’s little bit tricky one also because it’s natrium but we don’t say that somebody is hyposodium emic we say that they are hyponatremic okay and then class two was our BB our beta blockers okay our class 3 was our k for calium which is potassium on periodic table class four was calcium RCA and then a for adenosine is our class 5 which really mechanism action kind question mark but so class one class two class three class four class five uh hopefully little bit easier way of remembering those uh from this cardiac module interactive activity.
Thanks for listening to the Memorizing Pharmacology Podcast. You can find episodes cheat sheets and more at memorizingfarm.com again. You can sign up for the email list at memorizingfarm.com to get your free suffixes cheat sheet or find our mobile friendly self-paced online pharmacology review course at residency.teachable.com forward slash P forward slash mobile. Thanks again for listening.
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