EKG basics
- related: Cardiology, bundle branch blocks, ECG samples
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
Links to this note
- Cardiology
- ECG samples
- related: EKG basics
- Brugada syndrome
- related: Cardiology, EKG basics, bundle branch blocks