Abstract: [Abstract] To analyze the cause of ventricular tachycardia in patient with atrial fibrillation complicated with fungal infection during the course of treatment.An increased risk of arrhythmia will be caused by many factors, such as hypokalemia, fluconazole combined with amiodarone, et al.However,greater risk will be caused by a combination of amiodarone and fluconazole(0.4g?d-1).Great attention should be paid to the dosage of fluconazole under the necessary combination of fluconazole and amiodarone.