What is the role of electrocardiogram (ECG) in the diagnosis of cyanide toxicity?

Updated: May 30, 2020
  • Author: Inna Leybell, MD; Chief Editor: Michael A Miller, MD  more...
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On ECG, nonspecific findings predominate. Abnormalities may include the following [25] :

  • Sinus bradycardia or tachycardia

  • Atrioventricular blocks

  • Supraventricular or ventricular arrhythmias

  • Ischemic electrocardiographic changes

In some cases, shortening of the ST segment with eventual fusion of the T wave into the QRS complex has been observed.

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