EKG basics

• related: Cardiology, bundle branch block EKG findings, ECG samples

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Sizes

• EKG baseline sizes

Points

J Point

• EKG J point is between QRS and ST

EKG leads

• Chest leads aka precordial leads:
• V1-V2: anteroseptal
• V3-V4: anteroapical
• V5-V6: anterolateral
• Limb leads:
• LA: left arm
• RA: right arm
• LL: left leg
• RL/N: right leg

QRS Complex

• Left bundle branch block produces a dominant S wave in V1 with broad, notched R waves and absent Q waves in the lateral leads.
• Hyperkalaemia is associated with a range of abnormalities including peaked T waves
• Tricyclic poisoning is associated with sinus tachycardia and tall R’ wave in aVR
• Wolff-Parkinson White syndrome is characterised by a short PR interval and delta waves
• Ventricular pacing will usually have visible pacing spikes
• Hypothermia is associated with bradycardia, long QT, Osborn waves and shivering artefact

Others

• epsilon wave on EKG

Links to this note

• Cardiology

  • EKG basics

• Brugada syndrome

  • related: Cardiology, EKG basics, bundle branch block EKG findings

• ECG samples

  • related: EKG basics

• EKG baseline sizes

  • related: EKG basics