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.
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!
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.
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...
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
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.
''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?
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
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.
@@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
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.
I watched 3 videos before getting to this video. This video is excellent. Explains axis very simplistically.
Never been so confused
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.
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!
Best explanation I've seen yet. Thank you for making it so simple!!
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)
Idk why I have never seen your video in ages!!!!!!! Thank you Tom!
Tnx alot Tom , in a short lecture now it is cleared for me how to calculate the access deviations.
So glad to help!
Thank you so much for this video. It was very easy to follow and clearly explained axis deviation.
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.
Lead 3 from left upper limb to left foot right ?
Fantastic!
Another AMAZING video from zero to finals! Thanks :)
Glad you like them! Full ECG series coming at some point this year
Thank you!
explained very well,helped a lot
Thank you sir for your great explaining
Really helpful. Thanks!
Lead III is from left shoulder to LEFT foot, not right foot.
Great explanation
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...
Did all end up well?
Thanks alot bro!!!!
Please can you do a video on causes of LAD and RAD
Thanks. I'll add it to my list!
Thank you 😁 😁😁😁😁
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
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.
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?
Yes you are right!
@@ZeroToFinals no its left
@@psalmsraj188 kaunsi maal peeya hein bhai
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
Perfecto!
My frontal axis T is 2 degrees. Is that normal?
At 7:23 how do you end up with a negative lead II because the R wave is still positive? Axis really confused me.
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.
Tanxs a lot
Thank u...
''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?
thankyou ❤️
Wow
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
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.
Hi sir my baby slight left axis deviation of heart
Any problem
Very confusing video.
Not that good
It is NOT clear to me why the lead 3 should be +120 degrees! Explanation is not satisfactory.
I have the same problem!! It is placed identical with lead 2 so why are they on different axis??
@@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
So what does it mean to have LAD and can the heart move back ?
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.
My doctor told me it is a common condition that isn't serious but didn't give me the cause in my case.
Very Bad PRESENTATION
lol thanks
This is awful.
Nice vid but need to speak a bit louder
Thank you 🙏