ECG (Electrocardiogram) fully explained | Chapter circulation | Video 8
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- Опубліковано 26 сер 2024
- Electrocardiogram
Electrocardiography
The process of producing an electrocardiogram
Electrocardiogram
A recording of the electrical activity of the heart.
An electrocardiogram (ECG or EKG) is a test that checks how your heart is functioning by measuring the electrical activity of the heart. With each heartbeat, an electrical impulse (or wave) travels through your heart. This wave causes the muscle to squeeze and pump blood from the heart.
An ECG measures and records the electrical activity that passes through the heart. A doctor can determine if this electrical activity is normal or irregular.
An ECG may be recommended if you are experiencing arrhythmia, chest pain, or palpitations and an abnormal ECG result can be a signal of a number of different heart conditions.
What can you expect?
• An ECG is a non-invasive procedure, which means that nothing is injected into the body.
• It is painless.
• A number of electrodes - usually a total of 12 to 15 - are attached to various locations on your body including your arm, leg and chest.
• The electrodes are attached by small suction cups or adhesive patches.
• Sensors in the pads detect the electrical activity of your heart.
• The test is usually performed while you lie still.
• Results are most often recorded on graph paper and interpreted or read by your doctor or a technologist.
• The test usually takes 5 to 10 minutes.
P, Q, R, S, T Waves:
P Wave
The electrical activity of the heart originates in the sino-atrial node. The impulse then rapidly spreads through the right atrium to the atrioventricular node. It also spreads through the atrial muscle directly from the right atrium to the left atrium. The P-wave is generated by activation of the muscle of both atria.
Q, R, S Wave
The impulse travels very slowly through the AV node, then very quickly through the bundle of His, then the bundle branches, the Purkinje network, and finally the ventricular muscle.
The first area of the ventricular muscle to be activated is the interventricular septum, which activates from left to right. This generates the Q-wave.
Next, the left and right ventricular free walls, which form the bulk of the muscle of both ventricles, gets activated, with the endocardial surface being activated before the epicardial surface. This generates the R-wave.
A few small areas of the ventricles are activated at a rather late stage. This generates the S-wave.
Finally, the ventricular muscle repolarizes. This generates the T-wave.
To understand the morphology of the ECG waveforms one needs to appreciate only one biophysical fact: if a wavefront of depolarization travels towards the electrode attached to the + input terminal of the ECG amplifier and away from the electrode attached to the - terminal, a positive-going deflection will result. If the waveform travels away from the + electrode towards the - electrode, a negative going deflection will be seen.
1. A wave of depolarization traveling toward a positive electrode results in a positive deflection in the ECG trace.
2. A wave of depolarization traveling away from a positive electrode results in a negative deflection.
3. A wave of repolarization traveling toward a positive electrode results in a negative deflection.
4. A wave of repolarization traveling away from a positive electrode results in a positive deflection.
5. A wave of depolarization or repolarization traveling perpendicular to an electrode axis results no net deflection.
#Electrocardiography
#ElectricalActivityOfHeart
#HowECGIsPerformed
Lots of love and Respect From India 🇮🇳❤
You've made this video without wasting a single secound
Mind blowing sir
Allah Apne Hifz o Amaan me Rakhe aur Apke mulk me Shaanti Qayam kare
Kaha sa h ya sir
i’m in final year of mbbs,, because of you i understand ECG, it’s a technic to understand someone,, thanks 🙏 brother
Mastering ECG Step by step in Hindi
ECG graph explained easy in hindi || ECG limb leads placement & ECG interpretation
ua-cam.com/video/uhRHOxuPuA8/v-deo.html
earlier #ECG AXIS / CARDIAC AXIS|| done
ua-cam.com/video/ET-PiSnyDjU/v-deo.html
ECG SERIES BASIC TO FINAL step by step
in Hindi
next video on ECG chest LEADS with respective ECG graph @EarnestPhysician
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Thank yoU...
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Thanks
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Thank U Yr....mujhe bhut din se positive aur negative deflection samjh nhi aa rha tha but ab is vidio ko dekhne ke bad mera concept bhut acche se clear ho gya h thank u so much🙏🙏🙏🙏
For making this vidio to make ECG easy for the medical students or another people
This is best ECG lecture I have come across. Thank you Dr. Khan and my heartiest compliments...!!!
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It's really fantastic..ur way of teaching is jxt fantastic..the way in which u summarize ecg is speechless sir..thankuu Soo much sir..Allah bless u alot
Hey there.
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Watched number of videos on ECG. couldn't find a better explanation. This is the crisp and clear video on ECG I've seen so far. Keep it up sir.
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My mam is teaching me Ecg from last 3 weeks but I did not understand even 1 word but u understood me in 18 minutes wow and tomorrow is my test and now I m 100 percent ready
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Sach me bahut hi acha laga sir app ka ecg concept samjh ke great contain ... Itni simple way me app itne ache aur complex concept ko calm way me samjha sake wo bahut hi badi baathai
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Brilliant. Pehli dafa ECG ki basic smjh ai h. Thanks. Good explanation
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❤️ From 🇮🇳, thank you for making my concepts clear...
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Thanks
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I love the way u teach sir. May u prosper n may u live long with honour, gud health and imaan (Ameen suma Ameen)
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Thanks a lot❤
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Btw I am a NEET ASPIRANT
(Undergraduate medical exam in India)
Love from 🇮🇳🇮🇳
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May u live looong
Allah aap ku hifazat karay Aameen
Thank you for this beautifully explained ECG video.. Very well explained..
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Zabardst. Bhhht khoob... ALLAH apko mazeed toufeeq de
Sir you said that by the process of ECG, we can find out that which part of heart is defective or not working properly.....
And, in 18:35 , you said that repolarization of atrium cannot be seen in the graph....
So, if a persons atrium has some defect during repolarization or so, how will we get to know about it?
BTW very nice explanation Sir😃😃😃
there will be defect or delay in P wave
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Hi bro
I've request to repeat this video with opposite electrodes (up to the heart +ve & below the heart -ve)
It definately inhance the understanding for a new student who study ecg
Mashaallah ap k lecture sy mojoy boht help melte hy thank you sir
Outstanding lecture proud of you bro from 🇵🇰Pakistan
Allah ap ko bohat taraki de ameen ap ki wakah se itna acha samjh aa gaya ECG ❤️
Great work bro 👍🏼
Really great .... finally I understood what ECG is .... Jazak Allah 😇
Mastering ECG Step by step in Hindi
ECG graph explained easy in hindi || ECG limb leads placement & ECG interpretation
ua-cam.com/video/uhRHOxuPuA8/v-deo.html
earlier #ECG AXIS / CARDIAC AXIS|| done
ua-cam.com/video/ET-PiSnyDjU/v-deo.html
ECG SERIES BASIC TO FINAL step by step
in Hindi
next video on ECG chest LEADS with respective ECG graph @EarnestPhysician
Great sir....love from india
Allah apko ZINDAGI ki hr khushi ata frmy ,, Ameeeeeeen
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Thankyouuu sirrr❤
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So nicely explained sir. Thank you so much for your efforts 😊
THANKS BRO , MAY RAM BLESS U
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It’s more clear than professor’s lecture
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Thank you so much sir.
Mast explained sir love from india
He must be the Gold medalist of his time...
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I never really got the graph before this, but you made it so easy and simple to understand.
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Walekumasslam bhai
Very good
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