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Submitted: 11 Nov 2015
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J Cardiovasc Thorac Res. 2015;7(4): 154-157.
doi: 10.15171/jcvtr.2015.33
PMID: 26702344
PMCID: PMC4685281
  Abstract View: 2654
  PDF Download: 1065

Original Article

Evaluation of the P Wave Axis in Patients With Systemic Lupus Erythematosus

Rezzan Deniz Acar 1*, Mustafa Bulut 1, Sencan Acar 2, Servet Izci 2, Serdar Fidan 1, Mahmut Yesin 1, Suleyman Cagan Efe 1

1 Kartal Kosuyolu Education and Research Hospital, Department of Cardiology, Istanbul, Turkey
2 Department of Internal Medicine, Bilim University, Istanbul, Turkey
*Corresponding Author: Email: denizacar_1999@yahoo.com

Abstract

Introduction: P wave axis is one of the most practical clinical tool for evaluation of cardiovascular disease. The aim of our study was to evaluate the P wave axis in electrocardiogram (ECG), left atrial function and association between the disease activity score in patients with systemic lupus erythematosus (SLE).
Methods:
Standard 12-lead surface ECGs were recorded by at a paper speed of 25 m/s and an amplifier gain of 10 mm/mV. The heart rate (HR), the duration of PR, QRS, QTd (dispersion), the axis of P wave were measured by ECG machine automatically.
Results: The P wave axis was significantly increased in patients with SLE (49 ± 20 vs. 40 ± 18, P = 0.037) and the disease activity score was found positively correlated with P wave axis (r: 0.382, P = 0.011). The LA volume and the peak systolic strain of the left atrium (LA) were statistically different between the groups (P = 0.024 and P = 0.000). The parameters of the diastolic function; E/A and E/e’ were better in the control group than the patients with SLE (1.1 ± 0.3 vs. 1.3 ± 0.3, P = 0.041 and 6.6 ± 2.8 vs. 5.4 ± 1.4, P = 0.036, respectively).
Conclusion: P wave axis was found significantly increased in patients with SLE and positively correlated with SELENA-SLEDAI score. As the risk score increases in patients with SLE, P wave axis changes which may predict the risk of all-cause and cardiovascular mortality.
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