33 Upraised Ventricular Tachycardia (SVT)

Author: Nanette HeartBabyHome

Hey guys! It's Nanette with HeartBabyHome. Today we're looking at heart #33 which is upraised or superventricular tachycardia. "Super" means above and ventricular refers to the ventricles.

So super ventricular means that it happens above the ventricles or in the atria. Tachycardia. "tacky" means fast and cartia means of the heart. So when we're looking at a super ventricular tachycardia, that happens when extra electrical signals cause each atria to beat faster than normal. Now the ventricles still beat at a normal pace but the atria are faster than normal. This can happen because there's an extra spot that is sending out extra electrical signals or it can happen if the electrical signal, once it's done going through the ventricles, somehow finds a way to cross over back into the atria. Take a look at the normal heart. We're just gonna go through what happens electrically when there's a heartbeat.

It's actually pretty cool. So, in the right atrium it starts where labeled P and it travels across all of the atria and ends up at PQ and then it travels down to Q where it splits and ends up getting to R a little bit faster than it gets to S and then it goes out to T and that's where dissipates. Then it starts over and that's your heartbeat. So where it's labeled P--P is the Sinus Node. And that is where the electrical signal starts. Now when it gets the electrical signal, that's what tells, 'Oh, I need to squeeze.' and that pushes the blood out. So it starts the electrical signal and then when it gets to PQ, that is the Atrioventricular (AV) Node, and that's really cool because it allows the electrical charge to pause which gives time for the blood to squeeze out into the ventricles.

So after it is done pausing then it travels down to Q which is the Bundle of His and that's where it splits to the right and left. It reaches R before it reaches S so your left ventricle pumps first and then your right ventricle pumps after. They're really close together but that's how does it. And then T-- that's when the electrical charge dissipates. So, that's when your ventricles relax. So next time you go look at an EKG, and it has all these squiggly lines and you're like, "what the heck is this??" Well, now you know! Because P is where the electrical charge starts and then PQ oh--I didn't label that--but it's between P and Q where the line is flat that's where it's pausing so that the blood can get into the ventricles and then Q is where it splits at the Bundle of His R = left ventricle squeezing S = right ventricle squeezing and then T is where the electrical charge is dissipating and then the ventricles relax and it starts over.

33 Upraised Ventricular Tachycardia (SVT)

So now let's take a look at our SVT. If you look in the right atrium, there are two places that are labeled P. You've got your normal sinus node and then you've got another grouping that thinks it's a sinus node when really it's not. Both of those will send out electrical charges. The one that's not supposed to be there, a lot of times it'll send out random electrical charges or send them faster than it's supposed to Then everytime those electrical charges are sent out the atria will squeeze and so it squeezes faster than supposed to--that's the "tacky" in "tachycardia". Then when it gets to the PQ, it pauses. Everything else happens normally so the ventricles don't beat faster just that atria beat faster.

If you look at our cute little squiggly lines, on the P you can see it looks just a little bit different 'cause there's two there and then that other looks the same but it happens closer together because it's faster. Now, when you're getting an SVT he don't have time to get all of your blood down into the ventricles and so a lot of times you'll get dizzy or faint or have shortness of breath and that's one of the things that they can use to say, 'hey we need to check this out.' Then they hook you up to the EKG. The way they treat it is pretty cool. The first thing they do is they'll have you do physical things and i don't remember exactly what these things are but it'll something like cough and stand on your head or hold your breath and try to breathe through your nose or jump on one foot I mean it's not those things specifically--your doctor would be able to tell you. The physical things are the first Then the next thing they'd try to help you get rid of that SVT Then they would also look at medicines. I know they do beta blockers and a few other meds. That try to get your atria to have electrical signals the way they should be.

Another thing they do which I think is really cool and but it's kind of at the end because it's a medical procedure you go into the cath lab and they thread a catheter up one of your blood vessels into your heart and then their technology is really good--they can find exactly where that extra sinus node-like grouping is and they can heat up or cool down--they either use hot or cold to damage those cells then your heart heals but scar tissue does not conduct electrical current and so it can no longer send electrical current out to your atria because they can't get past the scar tissue so that that's another cool way that they can help people who have tachycardias I''ve also included a link too an animation I didn't do my own animation because there's lots of animations out there already. But, I did find one that i've really like so you can click that link below If you like this video please subscribe to my channel. If you have questions or would like to request a new heart image, please contact me at www.HeartBabyHome.com/contact I'm also "HeartBabyHome" on facebook, twitter, and pinterest. Thanks.

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