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​This website is a work in progress.

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Last update 10/04/2025

Intro to ECG

  • What is an ECG

  • Importance of patient details confirmation

  • Cpmdicyion system and ECG relationship

  • How to hook up an ECG

  • What information is provided on an ECG

  • Correct ECG positioning

  • Identifying artifact on an ECG

ECG intervals

  • Rate (regularity)

  • P wave (pattern and duration)

  • PR interval (P-QRS relationship)

  • QRS duration, pattern and axis

  • QT/QTc interval

  • ST segment

  • T wave pattern

  • U wave

Sinus rhythm

  • Sinus rhythm

  • Sinus bradycardia

  • Sinus tachycardia

  • Sinus arrhythmia

Types of conduction block

  • Sinus pauses

  • AV node block

  • Bundle branch block and fascicular blocks

Atrial arrhythmias

  • Premature atrial complexes

  • Atrial flutter

  • Atrial fibrillation

  • Atrial tachycardia

-Monomorphic

-Multifocal

  • SVT\

-AVNRT

-AVRT

  • Wandering atrial pacemaker

Ventricular arrhythmias

  • Premature ventricular complexes

  • Ventricular tachycardia

-Monomorphic

-Polymorphic/Torsades de Pointes

  • Ventricular fibrillation

Repolarisation abnormalities

  • STEMIs

  • Myocardial ischemia

  • Early repolarisation disorder

  • QT abnormalities

Short QT

Long QT

Other

  • Dextrocardia

  • Wolf-Parkinson-White syndrome

  • Brugada syndrome

  • Pericarditis

  • Acute pulmonary embolism

  • Chamber enlargements

RA/LA enlargement

RV/LV enlargement

Disclaimer

This is a free website with no hidden costs, and no financial benefits are received by the creator.

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This website provides general information and discussion for educational purposes about cardiac medicine for healthcare professionals. The content and any linked materials are not intended and should not be construed as medical advice. If the reader or any other person has a medical concern, he or she should consult with an appropriately-licensed physician or other healthcare worker.

Never disregard professional medical advice or delay in seeking it because of something you have read on this website or in any linked materials. If you think you may have a medical emergency, call your doctor or 000 immediately.

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There is no assurance that the information contained is correct, precise, complete, or up to date.

The views expressed on this website have no relation to those of any academic, hospital, practice, or other institution with which the author is affiliated.

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