Understanding ECG Axis and Axis Deviation

Рет қаралды 151,824

7 жыл бұрын

A simple explanation to help you interpret the axis next time you encounter an ECG.
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DISCLAIMER: This video is for education and entertainment only, and is not medical advice. This video should NOT be used for medical advice or to guide clinical practice. The Zero to Finals content should not be used in any way to guide medical decision making. Zero to Finals takes no responsibility for any actions taken or not taken based on the information provided. Local and national guidelines and senior clinicians are there to help you make decisions, not KZfaq videos. If you need medical advice or information, seek it from an appropriately trained and licenced doctor or healthcare provider that can address your individual needs. Zero to Finals cannot guarantee the accuracy of information in this video. Please highlight any errors you notice in the comments below - thank you.

Пікірлер: 59

@taino6890 Жыл бұрын

Never been so confused

@taraaziz2199 4 жыл бұрын

Best explanation I've seen yet. Thank you for making it so simple!!

@stephensheehan4499 3 жыл бұрын

I tend to go with Lead 1 and Lead 2 or Lead 3, easier was to remember is LAD- L is for leaving, so the R on the QRS complex is leaving each other so Lead 1 is positive and Lead 2 /3 is negative. RAD- R is for reaching so Lead 1 is negative and lead 2/3 is positive meaning they are reaching out towards each other.

@ranger6213 3 жыл бұрын

Hey Tom. I think you did a wonderful job explaining this concept, and that people are having trouble understanding it because of their own ineptitude, not by any fault of your own. That being said, I don't understand lol, catch me watching this video 30 more times!

@khadijaalkiyumi8122 Жыл бұрын

Idk why I have never seen your video in ages!!!!!!! Thank you Tom!

@oa2989 11 ай бұрын

Thank you so much for this video. It was very easy to follow and clearly explained axis deviation.

@BrynjaLives 3 жыл бұрын

At 9:20 is my 5 yr olds pretty much exact LAD. Thank you for helping me understand all this stuff. I appreciate it. (-61 degrees on hers btw)

@dwaithasivadas2421 3 жыл бұрын

Lead 3 from left upper limb to left foot right ?

@emmafoote7091 3 жыл бұрын

Another AMAZING video from zero to finals! Thanks :)

@ZeroToFinals 3 жыл бұрын

Glad you like them! Full ECG series coming at some point this year

@Monkey-ge1oq 3 жыл бұрын

explained very well,helped a lot

@Nortron_ 2 жыл бұрын

I use the thumb method for the axis deviation, but have been struggling with the actual degrees. thank you for finally making it clear what we are looking at to determine the degree.

@nabilahmad4863 3 жыл бұрын

Tnx alot Tom , in a short lecture now it is cleared for me how to calculate the access deviations.

@ZeroToFinals 3 жыл бұрын

So glad to help!

@Foad33 4 жыл бұрын

''The axis is left two right one'', this confuses me. You said, when lead II is negative, then it's left axis deviation. I read in the book that, in left axis deviation, you may have left ventricular hypertrophy (LVH). If lead II is negative, how this can be LVH?

@najiasalaamzada552 3 жыл бұрын

Thank you sir for your great explaining

@I_JDA 2 жыл бұрын

Really helpful. Thanks!

@Asphedal 6 жыл бұрын

Hi, for the example at the end, doesn't lead 2 also look isoelectric? So when i used that lead I get -30. Can you tell me what I am doing wrong. Thank you

@ZeroToFinals 6 жыл бұрын

Thanks for your comment. In the example at the end, in lead 2 the R wave is significantly bigger than the S wave. I agree it looks a little isoelectric, but by focusing on the QRS complex you can see that it is overall negative. Bare in mind also - if the axis is -60 degrees then any lead that is 90 degrees from that will be isoelectric. Lead 2 is at +30 which is 120 degrees away from the axis, so it is almost isoelectric (within 30 degrees), which is why it looks almost isoelectric.

@Squiderrant 2 жыл бұрын

Great explanation

@hellboy0623 4 жыл бұрын

Hy. Thanks for the video. Correct me if I'm wrong, but from what I have read, lead III goes from the Left Arm/Shoulder to the Left Leg?

@ZeroToFinals 4 жыл бұрын

Yes you are right!

@psalmsraj188 4 жыл бұрын

@@ZeroToFinals no its left

@prajwalshetty3063 2 жыл бұрын

@@psalmsraj188 kaunsi maal peeya hein bhai

@torijohnson2293 3 жыл бұрын

Thank you!

@hardz2110 5 жыл бұрын

At 7:23 how do you end up with a negative lead II because the R wave is still positive? Axis really confused me.

@Squiderrant 2 жыл бұрын

R waves are positive inflections by definition. The QRS complex as a whole is what we are looking at. The QRS is more dominant in the negative direction because the S wave (final negative inflection) is largest. Essentially it looks like it pulls downwards more than upwards overall.

@carmelcorreale3211 4 жыл бұрын

Yesterday I saw doctor she had called me in.She was concerned bout a blood test my (ck count was high) normal is 0- to 150 and mine was 638 something ..she ordered an ECG..my ankles were not attached to any leads....On completion I waited for a while later she said my ECG was normal? even though it says Abnormal ECG! An Extream Right Deviation. I don't understand the tiny breaks in the zig zag lines....does this mean my heart stops intermittently? cause the high ck blood count? Seeing a Rheumatologist tomorrow about an ongoing anti inflammatory condition could be that which causes the ck result

@ZeroToFinals 4 жыл бұрын

Hi Carmel. This channel is to help medical students with their studies and not for medical advice. I hope your doctors can answer all your questions.

@zombabeger 3 жыл бұрын

is deviation dangerous? i just check today since my heart kept skip a beat and i have a little chest tightning, i have my friend check me. i have right axis deviation...

@JohnSmith-tx5xq 2 жыл бұрын

Did all end up well?

@the_explaura 2 ай бұрын

Fantastic!

@kumar-bi1to 3 жыл бұрын

Thank you 🙏

@user-hs1zt7vc4x Жыл бұрын

Thanks alot bro!!!!

@caitlingriffiths990 5 жыл бұрын

Please can you do a video on causes of LAD and RAD

@ZeroToFinals 5 жыл бұрын

Thanks. I'll add it to my list!

@hamiltonismyfirstname2339 10 ай бұрын

My frontal axis T is 2 degrees. Is that normal?

@AzamatBagatov413 3 жыл бұрын

Thank you 😁 😁😁😁😁

@sreejithmg9101 3 жыл бұрын

Thank u...

@7SO 2 жыл бұрын

Perfecto!

@edomiasadyamseged9597 2 жыл бұрын

Tanxs a lot

@slubuggy123 6 ай бұрын

Lead III is from left shoulder to LEFT foot, not right foot.

@javairiasaleem9422 4 жыл бұрын

thankyou ❤️

@MrOsaka24 6 жыл бұрын

So what does it mean to have LAD and can the heart move back ?

@ZeroToFinals 6 жыл бұрын

Thanks for the question. There are a number of causes, including a variation of normal. If the underlying cause is corrected then it can go back to normal.

@MrOsaka24 5 жыл бұрын

My doctor told me it is a common condition that isn't serious but didn't give me the cause in my case.

@elei417 4 ай бұрын

Wow

@mangaraju2294 Жыл бұрын

Hi sir my baby slight left axis deviation of heart

@mangaraju2294 Жыл бұрын

Any problem

@rizwaanr5968 2 ай бұрын

I still don't understand the isoelectric and the 90 degree points you mentioned. You didn't explain why that is and hence you get a thumbs down

@SanalMG 3 жыл бұрын

It is NOT clear to me why the lead 3 should be +120 degrees! Explanation is not satisfactory.

@awesomeness7543 Жыл бұрын

I have the same problem!! It is placed identical with lead 2 so why are they on different axis??

@seanie9624 Жыл бұрын

@@awesomeness7543 lead II is looking up at the heart from the bottom left toward the right shoulder. Lead iii if looking across the heart from the right foot up toward the left shoulder. Think of the lead as a camera and what it's seeing from its point of view. On an X Y axis the midline is 90 degrees The apex is approx 30 degrees left of the midline and best viewed by lead ii. A 30 degree shift left of midline gives us 60 Lead iii is 30 degrees right of our midline giving us out 120 degrees giving us our look across the inferior aspect of our heart