048 How to Read an Electrocardiogram (ECG/EKG)

[OJASVIVYAS]

thank you so much...sir your video was a grt help..i m student of first year medicine..this was indeed superub..plzz continue the good work..looking forward to see more videos frm you

[Truthbearer1]

You sound Trini....good explanation! Thanks so much :)

[bizarre193]

ahaha I'm an ECG TECH and looool it helps lol :D

[Beardfascade]

Thank you, this has been very helpful.

[Nomindnotrouble]

Thank you.

[xxTaKe2xx]

You don't see the repolarization of the atria because it is overshadowed by the depolarization of the ventricles.

[wizardzwish]

so what part the atrium and ventricles contract and relaxed during depo and repo?

[evilmask972]

Great video! You just didn't explain that the QRS complex mask the repolarisation of the atrium (we can see on the edge of the QRS complex that the curve goes down a little) Thanks a lot for your videos anyway! It helped me a lot! :)

[XLordPikachuX]

this helped so much thank you 

[Olid2010]

thank you until now i didnt know about the u wave this helped a lot

[abdulaziz068]

please your opinion about:

"It mean's a lot for me"



youtube.com/watch?feature=play­er_embedded&v=TKAL0YSDHIs

On

prof.tnt@gmail.com

[DiyaBabyee]

I don't understand what depolarization and repolarization is?

[ojay12341234]

@DiyaBabyee Interactive biology made videos about depolarization and repolarization, check them out.. ther're pretty good

There is also a video about action potential it will help as well

[biomed29]

Excellent :-)

[InteractiveBiology]

@biomed29 Thank you! Please stay tuned for more Biology videos coming soon!

[akshalabi]

thank you ... i have been having problems with ECG but now i get it perfectly ..thanks to you

[InteractiveBiology]

@akshalabi You're welcome. Glad to know this helped. Stay tuned! We have more Biology videos coming very soon...

[VidUploDer]

thanks this helped

[InteractiveBiology]

@VidUploDer You're welcome! Stay tuned for more Biology videos coming very soon!

[hannasspawnofsatan]

This is fantastic!!! I am learning so much

[InteractiveBiology]

@hannasspawnofsatan Glad you found some value in it. You can check our website for more. Do stay tuned because we're planning to upload new Biology videos very soon!

[genius4themostpart]

why is the T wave "positive"? I understand, and it makes sense that the depolarization in the atriums and the ventricles have that effect on the EKG but not why the T wave is positive.

Thank you for great videos, I just found your channel and i love it!

[jaaz1802]

i m a army doc

n i find it vry helpful as i m on a isolated place

thnxs

[InteractiveBiology]

@jaaz1802 Glad to know the videos can help you from so far away. Thanks for the work You're doing. It makes a difference!

[chas21969]

this is awesome

[InteractiveBiology]

@chas21969 Thank You!

[missgomes18]

what abt atrial repolarisation?

[InteractiveBiology]

@missgomes18 All questions are answered in the Interactive Biology community forums from now on. Go to the website in the description and then visit the community. This is to make it as efficient as possible as we have multiple people over there to help answer questions.

All the best

[cocovuitton]

@missgomes18 Atrial repolarisations are so small that they get masked on the ECG by the depolarisation of the ventricles (i.e. QRS complex).

[MedAsstVera]

Excellent  video!! Thanks for sharing. :)

[InteractiveBiology]

@MedAsstVera You are very much welcome :)

[rotorway133]

hey thanks for the video. I just had a ECG for the Canadian Army and the results says : ALMOST NORMAL. After viewing your video i came to the conclusion that....nah..all seems to check out OK.....with my untrained eyes :) Awaiting the final results

[InteractiveBiology]

@rotorway133 I wouldn't use my video for self-diagnosis ;) but I hope that all goes well with the results.

[yassomatto]

thank you very much

[InteractiveBiology]

@yassomatto You are very much welcome :)

[maihot]

Thank you so much for these videos.

[InteractiveBiology]

@maihot You are very much welcome!

[TheMordyS]

Never knew about the U wave...

[afritschka]

Hi Leslie, Thank you so much for these excellent videos - they are incredibly helpful for brushing up on concepts that I hadn't completely grasped.

[InteractiveBiology]

@afritschka You are very much welcome. Glad to know that the videos are helping you understand better. Good stuff! Stay tuned for more :)

[shamshadrq]

awesome videos man. Keep up the good work :)

[InteractiveBiology]

@shamshadrq Thank you!

[03virgil]

thanks man. ur a life saver. love ur videos

[pirateXhunterXzoro]

For the P and QRS, why does the line go back down when they're still depolarized? Why does the T wave line go up during repolarization? And why does the Q and S go down before spiking up?

Thanks a lot

[InteractiveBiology]

@pirateXhunterXzoro Excellent question. That has to do with the fact that you aren't measuring the depolarization and repolarization directly on the heart. You are placing positive and negative electrodes on different parts of the body (i.e. wrists and ankles) and measuring the potential differences. These result from what happens in the heart, but there's more involved in that. I can't explain every nuance, but that's the overall reason from my understanding.

[petercourt]

Thanks for this. I was wondering, how long after depolarisation does contraction occur?

[InteractiveBiology]

@petercourt I'm not sure of the exact range but it should start within a few milliseconds. However, the contraction can last up to as much as 300 milliseconds. Check out episode 47 for info on the actual contraction.

[hupper12345]

you are a cool man! :D

[InteractiveBiology]

@hupper12345 No, YOU are cool ;)