Coronary Artery Disease— Myocardial Infarction Anatomic Site Leads ECG Changes Inferior II, III, aVF Q, ST, T Lateral I, aVL, V5–V6 Q, ST, T Anterior I, aVL, V1–V4 Q, ST, T Anteroseptal V1–V4 Q, ST, T
Coronary Artery Right Left circumflex Left LAD
Electrolyte Disturbances ↓Ca2+ Rate <100 Rhythm Regular PR interval Normal QT interval ↑
↑K+ <100 Regular Normal T peaked QT ↓
↑Ca2+ ↓K+ <100 <100 Regular Regular Normal/ ↑ Normal ↓ T flat/U wave