Background: Micra Transcatheter Pacing System is a leadless pacemaker for treatment of symptomatic high-grade atrioventricular block and persistent atrial fibrillation. We present a case report of dislodgement of a Micra device into the coronary sinus. Case presentation: An 87 year old man with permanent atrial fibrillation presented to the hospital with dizziness and fall. His medications included Lasix and Metoprolol. Electrocardiogram revealed atrial fibrillation with slow ventricular response. Metoprolol was held. During the hospital stay, telemetry monitoring revealed heart rates of 30-40 bpm. Micra device implantation was indicated for symptomatic bradycardia. After deployment, the Micra dislodged into the right atrium. Efforts to retrieve the device led to its embolism into mid-coronary sinus and dissection of the coronary sinus. Given comorbidities, the Micra was deactivated and a single chamber pacemaker was implanted with serial radiographic monitoring of Micra. Post procedure Chest X-ray (Fig. 1) and Computed Tomography Angiography of the chest (Fig. 2) confirmed location of Micra in the coronary sinus. Discussion: This is the first described case of dislodged Micra device in the coronary sinus. Device retrieval attempts resulted in dissection of the coronary sinus and there was no myocardial capture when pacing from the device. Serial CXR showed stable Micra position over the next two years. Conclusion: Embolization and dislodgement of Micra leadless pacemaker into the coronary sinus is possible and chronic management with serial imaging after abandoning the device is feasible.