Abstract:Cardiotoxicity is becoming one of the most harmful side effects of antitumor treatment, and the occurrence of arrhythmia is increasingly attracting attention. Arrhythmias caused by chemotherapy drugs include atrial fibrillation, atrial premature beats, supraventricular tachycardia, ventricular premature beats, ventricular tachycardia, sinus bradycardia, sinus arrest, atrioventricular block. Arrhythmias can be secondary to druginduced cardiomyopathy or heart failure, or they can occur independently. At present, the bradyarrhythmia associated with chemotherapy drugs has not drawn enough clinical attention, and the actual incidence of bradyarrhythmias related to antitumor treatment is underestimated. This article reviews this content so that clinicians can fully understand these adverse events and improve clinical management and patient prognosis.