Background <p>Rupture of the papillary muscle is a serious complication of acute myocardial infarction (AMI), usually leading to mitral valve dysfunction and severe regurgitation, which in turn causes acute heart failure, posing a significant threat to the patient’s life.</p> Case presentation <p>This case report aims to explore the feasibility and effectiveness of the DragonFly™ system in patients with papillary muscle rupture following AMI. We describe a 71-year-old male patient who was admitted due to chest tightness and chest pain, and upon examination, severe mitral regurgitation and papillary muscle rupture were found. Although the patient had missed the opportunity for emergency reperfusion, due to significant symptoms and heart failure, the cardiac team decided to perform a transcatheter edge-to-edge repair (TEER) of the mitral valve. During the procedure, guided by ultrasound and imaging, two valve clips were successfully implanted, significantly improving the mitral regurgitation. Postoperative assessment showed a reduction in regurgitation from 4 + to 1+, and the patient was discharged smoothly.</p> Conclusions <p>Patients with AMI accompanied by papillary muscle rupture have poor condition.</p> Clinical trial number <p>Not applicable.</p>