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ECG Interpretation Made Easy – How to Read a 12 Lead EKG Systematically!

ECG interpretation clearly illustrated by Professor Roger Seheult, MD. This is video 1 of the MedCram ECG online course:
Learn the skills for confident EKG interpretation in an easy, step by step process. Includes:

– High yield review of all ECG waves, complexes, and intervals (p waves, QRS complexes, PR interval etc.).
– How to systematically read an EKG (and what a normal ECG looks like).
– Key physiology of the heart related to the 12-lead ECG.
– Clarification of ECG Basics: leads and vectors.
– Review of common ECG paper and tracing mistakes.
– Axis on ECG and precordial leads.
– The autonomic nervous system and impact on the electrocardiogram.
– Heart rate and automaticity related to ECG rhythms.
– The R to R interval.
– Rhythm, arrhythmias, and escape rhythms.
– Premature beats and pauses on EKG.
– Bigeminy, trigeminy, and tachyarrhythmias.
– V-tach and torsades de points.
– Atrial and ventricular flutter.
– WPW syndrome (Wolff-Parkinson-White) and WPW pattern.
– Atrial fibrillation and ventricular fibrillation on the 12 lead ECG.
– Heart blocks and escape rhythms.
– Bundle branch blocks, hemiblocks, and fascicular blocks.
– Hypertrophy (LVH) and atrial enlargement.
– COPD, PE, Hyperkalemia, Digoxin and the EKG.
– Many practice EKGs (that Dr. Seheult interprets step by step).
– EKG quizzes follow each video.

Dr. Seheult is famous for his ability to explain and illustrate key concepts with just enough detail so they are understood, not memorized… You won’t become overburdened with too much ECG information too quickly.

Dr. Seheult will be your step by step mentor: reinforcing key cardiac physiology, explaining abnormal findings and how they develop in the first place, the appearance of a normal EKG, and a clinical perspective of electrocardiography nuances, scenarios, and rare findings.

This is video 1 on electrocardiogram (ECG/EKG) interpretation. The remainder of this medical course is at:

Visit for this entire course and over 100 free lectures. This is the home for ALL medical videos (many medical videos, medical lectures, and quizzes are not on YouTube).

Speaker: Roger Seheult, MD
Co-Founder of (
Clinical and Exam Preparation Instructor
Board Certified in Internal Medicine, Pulmonary Disease, Critical Care, and Sleep Medicine.

MedCram: Medical education topics explained clearly including: Respiratory lectures such as Asthma and COPD. Renal lectures on Acute Renal Failure and Adrenal Gland. Internal medicine videos on Oxygen Hemoglobin Dissociation Curve and Medical Acid Base. A growing library on critical care topics such as Shock, Diabetic Ketoacidosis (DKA), and Mechanical Ventilation. Cardiology videos on Hypertension, ECG / EKG interpretation (electrocardiograms), and heart failure. VQ Mismatch and Hyponatremia lectures have been popular among medical students. The Pulmonary Function Tests (PFTs) videos and Ventilator associated pneumonia bundles and lectures have been particularly popular with RTs. NPs and PAs have given great feedback on Pneumonia Treatment and Liver Function Tests among many others. Many nursing students have found the Asthma and shock lectures very helpful.

New free medical education videos are released first at

Visit for the full library of MedCram medical videos:

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Recommended Audience – Health care professionals and medical students: including physicians, nurse practitioners, physician assistants, nurses, respiratory therapists, EMT and paramedics, and many others. Review and test prep for USMLE, MCAT, PANCE, NCLEX, NAPLEX, NBDE, RN, RT, MD, DO, PA, NP school and board examinations.

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MedCram Website:


Produced by Kyle Allred PA-C

Please note: MedCram medical videos, medical lectures, medical illustrations, and medical animations are for medical education and exam preparation purposes, and not intended to replace recommendations by your doctor or health care provider.

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  1. I've been in practice 15 years, preparing for my board recertification. In the past I prepared by re-memorizing the rhythms and 'key' ekg findings. I have never truly understood so clearly, the reasoning behind every part of the EKG, and felt so comfortable and strong in approaching every line and why it all happens. Put it this way. I put my 12 year old son to watch with me, who is just learning the very basis of molecules and electricity. He followed along the first 7 videos (about 2 hours), with minimal need for me to explain some anatomy. He was able to answer the quiz questions and showed clear understanding. Really amazing, well done. Pay more money than you think you should, and when you're done, you will feel you made a good investment. When you sign up for an account, they will likely send a small discount code as well, but even full price, completely worth it.

  2. How can anyone just say this just happened and the heart just works. Then not believe in God. The heart is just amazing it really is. The whole body is as well. Great information not a student I have defibrillator with 100% pace. I have fell in love with the heart. I get print out of my ecg every visit and I bring it home. I'd like to send it to u so u can use it for class

  3. What does it mean to have abnormal repolarization and St depression in L4-L6 and abnormal R wave? My doctor told me it was nothing to worry about. I went in because for a few weeks I'd been really exhausted, had edema and swelling in both lower legs and feet and woke one morning with horrible chest pain, then nausea is strong I threw up, and my left arm which had been cramping for a few a few days became so weak I couldn't lift it. I fainted on on the way to the hospital. I had a negative troponin test. Only 0.015. A positive D-Dimer of 0.89 and positive NP PRO BNP of 473. They gave me maylox and told me I was fine.

  4. This example was great I’m a 7 yr RN transitioning from Behavioral Health into Telemetry and Ortho. In nursing school I compared the heart to a car battery as well. Thank you for this expounding of the heart, also I have come to the realization of who charges the heart for each pump of blood or life that goes through our bodies….

  5. Can somebody interpret my ECG result? I've have ECG trice but they keep on saying it's normal. But I'm still having a hard time breathing. Please respond so I can send you my ECG result. I would really appreciate if anyone help me about it. I'm scared.

  6. im taking my CCMA and this video is so so helpful! Especially since i havent take any previous medical courses and am learning everything for the first time! Thank you so much!

  7. Truly the best ever concept clearing video , I've been reaching out to teachers and books and different videos to understand this since a week . I'm so confident and strong now knowing it so well .

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