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Differences in 12-lead electrocardiogram between symptomatic and asymptomatic Brugada syndrome patients.

Abstract：

INTRODUCTION:Brugada syndrome (BrS) is an inherited disorder that predisposes some subjects to sudden cardiac death (SCD). It is not well established which BrS patients are at risk of severe arrhythmias. Our aim was to study whether standard 12-lead electrocardiogram (ECG) would give useful information for this purpose. METHODS:This study included 200 BrS probands (142 male, 62%; mean age 42 +/- 16 years). Symptoms related to BrS were defined as syncope, documented ventricular tachyarrhythmia, or SCD. We determined PR, QRS, QTc, T(peak), and T(end) interval from leads II and V(2) and QRS from lead V(5), R'/S ratio from lead aVR (aVR sign), QRS axis, and J-point elevation amplitude from right precordial leads from the baseline ECGs. RESULTS:Sixty-six subjects (33%) had experienced symptoms related to BrS. The only significant difference between the symptomatic and asymptomatic BrS subjects was the QRS duration measured from lead II or lead V(2), for example, the mean QRS in V(2) was 115 +/- 26 ms in symptomatic versus 104 +/- 19 ms in asymptomatic patients (P < 0.001). The optimized cut-off point of V(2) QRS > or =120 ms gave an odds ratio (OR) of 2.5 (95% CI: 1.4-4.6, P = 0.003) for being symptomatic. In a multivariate analysis adjusted with gender, age, and SCN5A mutation, the OR was 2.6 (95% CI: 1.4-4.8, P = 0.004). CONCLUSION:Prolonged QRS duration, measured from standard 12-lead ECG, is associated with symptoms and could serve as a simple noninvasive risk marker of vulnerability to life-threatening ventricular arrhythmias in BrS.

journal_name

J Cardiovasc Electrophysiol

journal_title

Journal of cardiovascular electrophysiology

authors

Junttila MJ,Brugada P,Hong K,Lizotte E,DE Zutter M,Sarkozy A,Brugada J,Benito B,Perkiomaki JS,Mäkikallio TH,Huikuri HV,Brugada R

doi

10.1111/j.1540-8167.2007.01050.x

subject

Has Abstract

pub_date

2008-04-01 00:00:00

pages

380-3

issue

4

eissn

1045-3873

issn

1540-8167

pii

JCE1050

journal_volume

19

pub_type

杂志文章

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