Proarrhythmia is a highly technical term in the field of cardiology, referring to a dangerous condition where common anti-arrhythmic drugs end up causing more arrhythmias in patients. In simpler terms, it's like trying to cure one problem while inadvertently creating another one. Synonyms for proarrhythmia are quite limited and mostly related to different types of arrhythmia like ventricular tachycardia, fibrillation, and other complications arising from the medication. These can include drug-induced arrhythmia, drug-mediated arrhythmogenesis, proarrhythmic effect, ventricular proarrhythmia, and so on. In essence, all these different expressions are referring to the ultimate outcome of proarrhythmia, which is a significant increase in the frequency of arrhythmia.