Title: Left atrium enlargement - electrocardiographic and echocardiographic study
- Sławomir Stawicki, Krzysztof J. Filipiak, Emil Wojda, Ewa Kowalik, Aleksandra Wisłowska, Grzegorz Opolski
- Original articles
- Polish Journal of Cardiology
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- Final page:
- left atrial enlargement, electrocardiography, echocardiography
The aim of the study was to evaluate the dependence between left atrium (LA) enlargement derived from M-mode and 2-D echocardiography and electrocardiographic criteria.
Material and methods: The study group comprised 40 consecutive patients (pts), including 9 women and 31 men, aged between 39 and 85 years (mean age: 64±9 years) and M-mode dimension of the LA measured from the parasternal long-axis view was >4.0 cm. Pts with chronić atrial fibrillation, pacemakers, pre-exci-tation syndrome, as well as artificial mitral and aortic valves were excluded from the study. Echocardiography evaluated the dimension and volume of the LA. During the M-mode we determined the LA dimension (AP) and LAvolume (\A,). During the 2-D echocardiography apical 2-chamber view, we evaluated the small LA dimension (N^, large LA dimension (N2), LA cross-section areafA^ and LAvolume (V2). During the apical 4-chamberviewweevaluated the LA superior-inferior dimension (M^, lateral-medial LA dimension (M2), cross-section area (A2) and LA volume (V3). The standard ECG demonstrated 3 LA enlargement criteria: P--wave duration (TP), Macruz (WMA) and Morris (WMO) indexes.
Results: We noted a significant correlation between WMO and echocardiographically evaluated V1, A2, AP, Mi, N2 (r = 0.49, 0.45, 0.41, 0.39, 0.32, respectively). A significant correlation was also noted between WMA and echocardiographically evaluatedV3, M2(r = 0.40, 0.32, respectively). No significant correlation was found between TP and echocardiographically evaluated LA dimension and volume. Conclusion: Our results demonstrate that Morris index renders the most accurate enlargement of the LA, ba-sed on standard echocardiographic examination. Thus, it should be recommended towards electrocardiographic LA enlargement evaluation.