Swedish UFC Prospect Pauses Career After Reported Atrial Fibrillation

Overview

• Multiple outlets reported late May that Andreas Gustafsson has temporarily suspended his MMA career and will not fight Daniil Donchenko at UFC Baku.
• Frontkick published medical documents that those outlets say diagnose Gustafsson with atrial fibrillation and recurring episodes of rapid heart sensations.
• Reports say his heart symptoms intensified during the UFC Baku training camp despite the fighter appearing to be in strong physical condition.
• The UFC has not publicly confirmed a replacement opponent for Donchenko or issued a detailed medical statement about Gustafsson’s condition.
• Atrial fibrillation can sharply reduce endurance and pose acute risks during intense exertion, so recovery timing and the prospect of returning to prior form remain unclear.