4. Q Wave Overview - ECG assessment and ECG interpretation made easy
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- Опубликовано: 8 сен 2024
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The Q Wave
A Q wave is any negative deflection that precedes an R wave
The Q wave represents the normal left-to-right depolarisation of the interventricular septum
Small ‘septal’ Q waves are typically seen in the left-sided leads (I, aVL, V5 and V6)
Q waves in different leads
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Small Q waves are normal in most leads
Deeper Q waves (Greater than 2 mm) may be seen in leads III and aVR as a normal variant
Under normal circumstances, Q waves are not seen in the right-sided leads (V1-3)
Pathological Q Waves
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Q waves are considered pathological if:
Greater than 40 ms (1 mm) wide
Greater than 2 mm deep
Greater than 25% of depth of QRS complex
Seen in leads V1-3
Pathological Q waves usually indicate current or prior myocardial infarction.
Loss of normal Q waves
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The absence of small septal Q waves in leads V5-6 should be considered abnormal.
Absent Q waves in V5-6 is most commonly due to LBBB.
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thank you so much sir ... currently I'm working in cardiac icu and I'm learning all these things ....and you explain it in easy way .....
It's my pleasure
Thank you, this is so helpful. You solved my problem within 10 minutes. Thank you so much sir.
Great to hear!
Clear, short and understanding explanation. Thank u a lot doctor!
Glad it was helpful!
Thank you so much for the lecture. God bless you. amenn
Welcome!
Such a beautiful lecture 💛
Thank you so much.
You're most welcome!
Nice lecture.
Love from Bangladesh
Thanks and welcome
The Best! 💖Thank you very much sir
We are all Grateful to u 🙏
It's my pleasure
So incredibly helpful! Thank you so much for your videos
You are so welcome!
Thank you for this direct and simple lecture
Glad it was helpful!
wonderfull teacher thank somuch sir GOD bless you
So nice of you
Great learning
video! Thanks!
Our pleasure!
Thank u so much
thank you soooooo much!!!!! well explained
You are most welcome
Excellent sir!
Thank you kindly
Thank you very much sir ,
All the best
Very nice sir 👌👌👌
Thank u for the explanation
So nice of you
thank you
nice information
My mother has arteries blockage she is using medicine recently her ECG says q in iii what does it mean ? Pls suggest
Sir i have a doubt 11.26 u said that the ecg report having deep pathological q wave sir but if it is deep pathological q wave then where is R wave in that sir
Sir do abnormal q wave in v4 and v5 be a serious concern?
Good 👍
RESPECTED DOCTOR,
I have taken ECG today 12-05-2023. In report it is mentioned as 1. normal PR and QT interval. 2. QS inferior Leads. 3. No acute ST changes
What does this mean. Kindly explain.
🙏🏽
is T wave inversion normal in v1?
Anyone tell me, the real reason why q wave is abscent in v1, v2..
I think the depolarization of the intact septal wall does not allow it to penetrate with sufficient intensity for the q wave to appear towards v1 v2 leads.
It was not clear sir, i mean video was not clear
😇😇😇😇😇😇😇
Kash hindi me bolte sir to or bhi samajh me ata
Hello, thanks a lot for your video. I have one question, what is the difference between an evolved myocardic infarction and an old MI? Thanks a lot