Mobile ECG for QTc assessment in cLQTS: A step toward remote monitoring.

INTRODUCTION

Handheld mobile ECG (mECG) devices offer potential for remote QTc surveillance in congenital long QT syndrome (cLQTS), but validation against standard 12‑lead ECGs is limited.

METHODS AND

RESULTS

We studied 102 cLQTS patients (median age 36), using consecutive 12‑lead ECGs and KardiaMobile 1 L and 6 L recordings. Agreement with 12‑lead ECGs was assessed using Lin's concordance correlation coefficient (CCC) and Bland-Altman analysis. Mean biases were < 10 ms, within the predefined threshold for excellent agreement. Reproducibility was high.

CONCLUSION

These findings support the cautious integration of mECG-based QTc monitoring for high-risk cLQTS patients.