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electrophysiological studies(EPS)
studies done inside the heart on its electrical activation and response to electrical stimuli or drugs; these usually include
intravenous or intra-arterial placement of one or more electrode catheters at sites in the atria, ventricles, or coronary
sinus, and sometimes the pulmonary artery or aorta. They record activity or stimulate the heart at various rates and cadences
and are aids for evaluating electrophysiologic properties such as automaticity, conduction, and refractoriness. They also
initiate and terminate tachycardias, map the sequence of activation, and aid in evaluation of patients for types of therapy
and the response to therapy. During these studies catheter ablation procedures, such as radiofrequency ablation and electrical
ablation, may be done.
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