Normal sinus rhythm on an EKG | Circulatory System and Disease | NCLEX-RN | Khan Academy

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Created by Bianca Yoo.
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7 июл 2014

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Комментарии : 94

@bradleytanita8855 4 года назад

when you just got your EMT basic, but but you get bored during quarantine so you start teaching yourself how to read ECG's

@Andylopez172285 8 лет назад

Just started my paramedic program, and this video made understanding ECGs a lot easier, thank you!!

@carynhill4983 2 года назад

Gtg

@ashleyflowers9954 7 лет назад

I have to say that you did a great job with covering the essentials of EKG basics.

@elizabethsydes6974 4 года назад

This was such a wonderful video thank you so much! And I have to disagree with everyone who is saying you talk to fast, that was a perfect pace. It kills me a little inside when RU-vidrs talk through everything painfully slow. Thanks again!

@janakhabouri8271 6 лет назад

Best explanation of EKG I’ve seen so far and I’ve looked at many many many videos

@nataliecapretta2376 4 года назад

it's so satisfying for the likes to go from 1.9 to 2 with the power of my mouse. I'm graduating this year from high school and plan to study paramedicine next year. Thanks for giving me a fantastic head start.

@JV-sc2wr 4 года назад

This is was SO well explained. Thank you!!

@panisarakasemsomporn1373 3 года назад

Thanks a lot! Your explanation is so clear as if you can read my mind and know what things I doubt.

@JustPiichi 10 лет назад

Thanks! I never did know why the wave go in the same direction! Makes me feel better to know now :)

@lrs909 8 лет назад

I also like this video. I love the bright colours and drawings as a means of teaching!

@willdill192 8 лет назад

This is a great video! Thank you so much!

@3DOrigamiandMore 10 лет назад

Love the videos! Wish they could have been here during my EKG unit :P

@aurelcato7465 7 лет назад

Oh my God, this is amazing and informative. The only thing I'm wondering now is why is the S wave negative?

@domination98mta51 4 года назад

Going up the Purkinje the vectors goes in the opposite direction of D2 lead so it captures a negative wave..

@halirichardson9619 7 лет назад

Awesome video thank you!!!!!

@hsingh3468 5 лет назад

amazing video thankyou.... very helpful

@PatriciaHinesDenise 3 месяца назад

So glad this video is here. I just started my medical assistant program and scribing for a cardiologist. This is the most helpful video. 😀

@jordanjensen3899 6 лет назад

Nice video! Helped a bunch.

@VickiBee 7 лет назад

I do this for a living. I was an ECG Technician before I was a Paramedic.

@carminavito24 6 лет назад

Absolutely helpful!

@HafizahHoshni 5 лет назад

Awesomely informative and perfectly explained! Thank you so much! 😊😊 6/3/2019

@user-si8sq2qz8m 5 лет назад

OMG this video is great. Thanks

@sahreenhusan943 7 лет назад

she is really good

@kimparkin2107 6 лет назад

this video is great! thanks :)

@ChrisBurnsATL 7 лет назад

Wow...just wow.

@naderrefai7083 6 лет назад

THIS IS GOLD TY

@mariaaaaali 4 года назад

Golden explanation!

@paulmcleod7126 10 лет назад

Fantastic.

@nellyhoffman6194 8 лет назад

this is just epic im so gonna pass my exams !!

@Arham1716 Год назад

The explanation was fabulous

@topalaluiza9647 Год назад

Thank you so much 🙏🤗🌹

@bigdaddylee8019 8 лет назад

life saver!

@Incubus187 7 лет назад

This is 🔥

@x-menbasketball2639 6 лет назад

Nice vid thanks!

@virupannamedikinal Год назад

Thank you so much

@nhanle211 2 года назад

very informative

@cristinabeltranagost5399 8 лет назад

looooooove it!!!

@kamion2008 8 лет назад

if you take mobitz I and fragment with lost QRS there is no repolarization seen after P wave so this whole QRS obstructing view of atrial repolarization sounds like BS to me

@avatar098 9 лет назад

Did anyone tell you that you sound like Cortana? Anyways, great video! I definitely needed as a refresher.

@kaylastymest6504 8 лет назад

Great video - instructor is speaking too fast though!

@bridgettebbe5221 8 лет назад

+Kayla Stymest That's why you can just decrease the speed

@reyescristy1988 8 лет назад

+Bridget Tebbe Then it is ridiculously slow, she speaks WAY too fast.

@thesaltyspoon7483 3 года назад

@playtheuke 8 лет назад

At the end she mentions that depolarisation is when the cells become negative and the cells are positive at rest... Isn't this the other way around?

@silveira1995 7 лет назад

EKG measures the extracellular space, so it's the other way around.

@noorsami5777 8 месяцев назад

noted

@mariannetouma1891 7 лет назад

Everyone is saying the instructor talks too fast meanwhile I watched it at speed 1.5 and managed to understand everything. THANK YOU!

@doctormwpepper 6 лет назад

As a medical professional, you're expected to have and display some empathy. Your comment is unnecessary. Everyone learns at their own pace.

@dominicklaporte 8 лет назад

She mentioned that atrial repolarization is buried in the QRS complex, but then why don't we see any atrial repolarization in rhythms like second or third degree heart blocks or in p-wave asystole?

@melaniemehle5839 4 года назад

Apparently it's a common misconception. I have come across articles that mention this phenomenon, and they say it's because the atrial repolarization is probably too small of an amplitutde to see on the strip.

@womanfraumujer 8 лет назад

this teaching not explained as well as most khan

@TheKeysersozey 8 лет назад

What does the S wave symbolize? and why is it negative?

@Decloren 5 лет назад

The last part of the ventricles to depolarise is the left portion of base of the heart. So towards the end of the depolarisation of the ventricles, this left side is still polarised and electropositive but the rest of the ventricles are now depolarised and electronegative. And that causes a potential difference between the base and the ventricles and the direction of this potential is opposite to the lead II hence it reads negative potential.

@MeganMichelleTimeLapses 6 лет назад

confused on leads? why is that lead 2

@briang8663 6 лет назад

PR Interval should be between .12 seconds to .2 seconds. longer than .2 seconds is a problem.

@VickiBee 5 лет назад

But seeing this surprises me that so many nurses (RN's) kept telling us they have "no knowledge of reading EKG's." Really? After needing to know all this in order to take the NCLEX-RN test? That's surprising to me.

@Christinegou 9 лет назад

how is depolarization negative and repolarization positive? depolarization is becoming closer to 0 mV while repolarization is moving away from 0

@makingway1 9 лет назад

I believe your logic is correct. Depolarization is moving towards more positive, while repolarization is moving towards more negative. In EKGs though, we can only "see" or "measure" the outside of the cell. Thus, depolarization will show as negative on the outside of the cell (POSITIVE on the inside of the cell), and repolarization will show as positive on the outside of the cell (NEGATIVE on the inside of the cell. Hope that makes sense.

@fraddi 9 лет назад

makingway1 my prof told us that when depolarization occurs (Na cells move in) that is an upward deflection on the ECG and is seen as positive charges moving towards the electrodes and that is why we get a upward deflection. That doesnt make sense since a depolarization is positive charges moving into the cell away from the surface of the body, meaning we should instead get a down ward deflection as the depolarization is moving towards the leads

@RonAmundson 9 лет назад

Hugh Jazz What goes on at the cellular level is not always representative of what we can measure on the skins surface. That being said, you are correct, that if we were to put an electrode near the external surface of an individual cellular wall we would see it become negatively charged relative to the bulk of extracellular fluid during depolarization. The key bits being individual cell and bulk of extracellular fluid. What we have from a bigger picture point of view is a gradient of potentials with distance. This gradient gets even crazier when we go out the skins surface. At that point, all we can measure are potential differences across the skins surface. Depending upon electrode placement and polarity we could see the needle either go up or down during depolarization... so a series of conventions were created to avoid confusion. Check cvphysiology.com/Arrhythmias/A014.htm for the details and some animations showing whats going on.

@fraddi 9 лет назад

thank you! Wow am I glad you read my post!

@nathanfranks1476 3 года назад

A the very end when she is talking abut the t wave, I understand why she has a - representing depolarization instead of a +. When cell depolarize, they are becoming more positive, so why is she saying the electrode is seeing the depolarized cells as negative?

@KaylaxoxoAmswer 2 года назад

I am confused at the end of the video because depolarization means becoming more positive?

@Reduanul-Hasan 8 лет назад

good video..learning thing..but instructor talk too fast.

@wahibausa1013 8 лет назад

wow so fasttttt

@valeortiz2595 5 лет назад

put subtitles in spanish pliz jeje :D

@gracedone5565 6 лет назад

Putting the speed to 0.75 helps a lot

@majoodb9253 8 лет назад

U r fucking awesome

@Lorena-mr4qz 6 лет назад

Good content but too quick .. not like sal .. some things could use a few more seconds on like the boxes of the waves etc

@elpedro812 8 лет назад

8:08 should not be "-" inside and outside at rest? I don't get why it's "+"

@ritolinchu 8 лет назад

That's what I was thinking too. Shouldn't she have started with both negatives and then the endocardial cells turning positive first?

@elpedro812 8 лет назад

In my opinion should be like that

@sarahbenani653 7 лет назад

+Marco Valtierra i'm agree with you, she made an reversion about depolarisation and repolarisation, but the explanation about the positive voltage fits because Lead II RA->LF= - ->+ it goes in the same direction depolarisation = - endocardium -> + epicardium and repolarisation= + epicardium -> - endocardium

@samuelcondon3669 7 лет назад

we are actually looking at the extracellular surface so charge is positive.

@silveira1995 7 лет назад

That's it!

@valeortiz2595 5 лет назад

pongan subtítulos en español prros

@AnkuLIFE 5 лет назад

Please choose light colors , dark colors are hardly visible in black background or else use light background.

@taylorbush5100 8 лет назад

Actually one BIG box equals 1 second

@elizabethsydes6974 4 года назад

There aren't really any BIG boxes on ECG strips. Every 5 of those big boxes (0.2 x 5 = 1 second) is a dash above the graph so you can easily see what 1 second is. But what she's saying is correct.

@nellyhoffman6194 8 лет назад

you are so beautiful i love you !!