Atrial fibrillation and coronary artery disease are both heart diseases, but they are 2 different types of heart diseases. Just like the plumbing and electrical circuits in a house, coronary heart disease is a problem with the plumbing, while atrial fibrillation is a problem with the electrical circuits, so they are different heart diseases. However, the two often exist at the same time. What if they both exist? You should let your doctor assess which is more urgent and give priority to treating the more urgent condition. However, both can be treated at the same time during hospitalization, for example, atrial fibrillation ablation first, followed by a good coronary stent 3 days later. Because the treatment pathways for these 2 diseases are different, atrial fibrillation is venous, from the lower extremity, and coronary artery disease is arterial, from the upper extremity. Therefore, the treatment of the two diseases will not be contradictory.