Long-term evaluation of sensing variability of a floating atrial dipole in a single‑lead defibrillator: The mechanistic basis of long-term stability of amplified atrial electrogram

•We verified the atrial sensing stability of a VDD lead in Asian ICD patients.•The sensing variability of atrial dipole significantly decreased at 12–24 months.•The concern for atrial sensing stability can be alleviated with a lead 2 years old.