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ECG (Electrocardiogram) fully explained | Chapter circulation | Video 8
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- เผยแพร่เมื่อ 6 พ.ค. 2020
- 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
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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
th-cam.com/video/uhRHOxuPuA8/w-d-xo.html
earlier #ECG AXIS / CARDIAC AXIS|| done
th-cam.com/video/ET-PiSnyDjU/w-d-xo.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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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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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.
Brilliant. Pehli dafa ECG ki basic smjh ai h. Thanks. Good explanation
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Thanks
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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
Mashallah concept clear ho gya , jazakallh.
Thanks
Thank you for this beautifully explained ECG video.. Very well explained..
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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aaj ECG par concept clear ho he gaya 3 bar class teacher se padha tha par samajh nahe aaya tha
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Zabardstttt!❤ jazak'Allah
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Love from India
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Your teaching is magical. Thank you.
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Before this lecture i have no idea about ECG and now i have taken a lot of information from this lecture ! Thank you so much Sir !!!!!!!!!!!
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welcome
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So nicely explained sir. Thank you so much for your efforts 😊
Sukr h Allah ka .Allah ne ye channel s rubaru karwayi .Allah apko aur ilm de .❤
Jazakallah sir itne saare teacher ke baad aap mile
Btw I am a NEET ASPIRANT
(Undergraduate medical exam in India)
Love from 🇮🇳🇮🇳
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Abdul Rehman Apny Boht Achy Treqy se samjhaya me ek nurse hu lekin mjhy aj tak ecg sahi se nh interpretent krna aya aj apny samjhaya
I am a student of 1st year u explained every thing very well👍 thanks sir for such a great effort
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Cardiac system kabhi samjj nhi aayi but aapne majeed 18 min me samjha di jajaak-allahu-khaira 😊
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very helpful in my NEET journey.
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THANKS BRO , MAY RAM BLESS U
Sir kamal ka knowledge hy ap k pas❤
Every field has a legend, you are the legend and lion of biology.....
Kamal ka teacher. I am so impressed such a wonderful teacher you are..
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
th-cam.com/video/uhRHOxuPuA8/w-d-xo.html
earlier #ECG AXIS / CARDIAC AXIS|| done
th-cam.com/video/ET-PiSnyDjU/w-d-xo.html
ECG SERIES BASIC TO FINAL step by step
in Hindi
next video on ECG chest LEADS with respective ECG graph @EarnestPhysician
Kindly sir your methods are very easy.
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He teaches like nursing masters guys very clear concepts for medical topics same like them
mashallah bht acha lecturre tha achay se concept clear hogya thanku so much sir
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Mast explained sir love from india
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MashAllah Bhai jan Buht easily samjaya apne
Allah ap ko bohat taraki de ameen ap ki wakah se itna acha samjh aa gaya ECG ❤️
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Thank you so much sir g teacher ni to itni mushkil tareqy see bataya ki muji laga ECG kabi samj nhi paogi ,😏😏but apki leactur ni buhut help ki is lia thank you so much for this 🤩🤩🤩 u r such great teacher 💞💞💞I still waching for your more videos,💞💞
Great work bro 👍🏼