Adenosine in er for emergency treatment of severe svt episode. could it not work and/or cause cardiac arrest/death?

Adenosine is useful: for the treatment of a certain type of SVT but not all SVTs. In addition, it is not always affective with an initial dose and requires second higher doses to be administered. It is unlikely but not impossible to cause cardiac arrest and/or death. Most SVTs are curable by radio frequency ablation in the hands of a qualified Electrophysiologist. Make an appointment for evaluation.