<unk>  is a new or more frequent occurrence of pre-existing arrhythmias, paradoxically precipitated by antiarrhythmic therapy, which means it is a side effect associated with the administration of some existing antiarrhythmic drugs, as well as drugs for other indications. In other words, it is a tendency of antiarrhythmic drugs to facilitate emergence of new arrhythmias.
Proarrhythmia
Cardiotoxicity
Cardiovascular drift
Hypsarrhythmia
Coronary ischemia
Hepatotoxicity
Lipotoxicity
Neurotoxicity