Article Text

Download PDFPDF
P-Wave Duration and Dispersion in Patients With Emery-Dreifuss Muscular Dystrophy


Background Paroxysmal episodes of atrial fibrillation frequently occur in Emery-Dreifuss muscular dystrophy (EDMD). Although previous studies have documented a variety of electrocardiographic abnormalities in EDMD, little is still known about P-wave dispersion (PD), an independent risk factor for the development of atrial fibrillation. The aim of our study was to evaluate the P-wave duration and PD in patients with EDMD with conserved systolic and diastolic cardiac function.

Methods The study involved 36 patients with EDMD (age, 20 [SD, 12] years; 26 men) and 36 healthy subjects used as controls, matched for age and sex. P-wave dispersion was carefully measured using 12-lead electrocardiogram. Compared with the healthy control group, patients with EDMD presented increased maximum P-wave duration (108.2 [SD, 22.2] vs 97.8 [SD, 11] milliseconds, P = 0.04) and PD (51.4 [SD, 12.8] vs 39.3 [SD, 9.7] milliseconds, P = 0.004) values. No statistically significant differences in left atrium diameter (37.1 [SD, 2.9] vs 34.1 [SD, 4.2] mm, P = 0.3) and maximum left atrium volume (15.2 [SD, 3.8] vs 14.1 [SD, 4.2] mL/m2, P = 0.4) were found between the 2 groups. We divided our study population into 2 subgroups, according to the different genetic diagnosis, patients with laminopathy EDMD (n = 17) or with emerinopathy EDMD (n = 19). No statistically significant differences were found in PD between the 2 subgroups (54.6 [SD, 15.6] vs 50.2 [SD, 11.5] milliseconds, P = 0.4).

Conclusions Our study showed a significant increase of maximum P-wave duration and PD in patients with EDMD with conserved systolic and diastolic cardiac function.

Key Words
  • Emery-Dreifuss muscular dystrophy
  • P-wave dispersion
  • atrial fibrillation
  • arrhythmias

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.