Introduction

Obstructive sleep apnea syndrome might have a deleterious effect on ventricular repolarization, reflected by an altered frontal planar QRS/T angle.

Material-Method

We retrospectively analyzed the medical records of a total 120 patients underwent overnight polysomnography test. Patients were divided into 4 groups according to apnea hypopnea index (AHI) values (< 5/h, 5-15/h, 15-30/h, and > 30/h). The frontal planar QRS/T angle was defined as absolute difference between the frontal QRS wave axis and T-wave axis on resting 12-lead surface ECG.

Material-Method

We retrospectively analyzed the medical records of a total 120 patients underwent overnight polysomnography test. Patients were divided into 4 groups according to apnea hypopnea index (AHI) values (< 5/h, 5-15/h, 15-30/h, and > 30/h). The frontal planar QRS/T angle was defined as absolute difference between the frontal QRS wave axis and T-wave axis on resting 12-lead surface ECG.

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