Figure 5. Representative case. The patient was a 73-year-old man who underwent atrial fibrillation catheter ablation 3 months ago. He sometimes suffered palpitation. We performed the ECG monitoring using the Duranta delivered by the postal service. The ECG device arrived at the patient’s home on the scheduled day. He put the device on by himself, and ECG monitoring started. On the next day, the patient felt palpitations, and paroxysmal atrial fibrillation was recorded by the Duranta. On the third day, the ECG monitoring ended. The patient sent the ECG device back to the hospital by post. By using this postal delivery service, the patient did not need to visit the hospital to undergo long-term ECG examination. ECG, electrocardiogram.