Proarrhythmia refers to the paradoxical effect where an antiarrhythmic drug, intended to suppress cardiac arrhythmias, actually causes new or worsened arrhythmias. This phenomenon is a significant concern in the field of Toxicology, where understanding drug-induced adverse effects is crucial. Proarrhythmia can manifest in various forms, including tachycardia, bradycardia, or complex arrhythmias like ventricular tachycardia.
