ECG changes in calcium channel blocker poisoning

Last reviewed 01/2018

The electrophysiological effects of calcium channel blocker overdose include:

• sinus bradycardia
  
  
• accelerated atrioventricular node conduction
  
  
• 2nd and 3rd degree heart block
  
  
• sinus arrest with nodal escape rhythms
  
  
• asystole

Reference:

• Kenney, J. (1994). Treating overdose with calcium channel blockers. Br. Med. J., 308, 992-993