Basics

PR Interval

QT Interval

Arrhythmia

ECG change - Electrolytes

ECG change - Ischemia & Infarct

LVH

Axis Deviation

LBBB

Classic patterns

• Hypothermia: bradycardia, J wave, prolonged QT, arrhythmias
• Digoxin: “reverse tick” ST depression, T inversion/flattening, short QT
• ST elevation: MI, pericarditis, early repolarisation, LV aneurysm, Prinzmetal
• ST depression: ischaemia, digoxin, hypokalaemia