• His/Purkinje conduction system blockage
  • RBBB ECG
  • LBBB - Left Bundle Branch Blockage ECG
• Excitation generated by ventricular myocardium
  • Premature ventricular beat, ventricular tachycardia
  • Pre-excitation
  • Captures
• !pVT
• SVT + AV Blocks
• !Hypercalcemia - ↑Ca (> 2.5)