Sudden death after normal coronary angiography and possible causes.

Coronary angiography remains as the gold standard for the diagnosis of coronary artery disease. Serious complication due to coronary angiography is very rare and generally it is considered safe in experienced hands. Here, we would like to present two cases without severe stenosis in the coronary arteries suffering from cardiac arrest soon after the procedures, and draw attention to this lethal complication and review the possible causes of sudden death occurring after coronary angiography.