Predictive Value of P Wave Terminal Force in Lead V1 for Atrial Fibrillation: A Meta-analysis
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Background: Several studies have explored the association between P wave terminal force in lead V1 (PTFV1) and risk of atrial fibrillation (AF) occurrence, but the results were controversial. This meta-analysis aimed to examine whether abnormal PTFV1 could predict AF occurrence.
Methods: We searched PubMed, Embase, and Cochrane Library databases for articles published before August 25, 2018. Pooled odds ratios (ORs) of AF occurrence were calculated using random-effects models to explore the significance of PTFV1.
Results: A total of 12 studies examining 51,372 participants were included, with 9 studies analyzing PTFV1 as a categorical variable and 4 studies analyzing PTFV1 as a continuous variable. As a categorical variable, abnormal PTFV1 (>0.04 mm s) was significantly associated with AF occurrence with a pooled OR of 1.39 (95% confidence interval [CI] 1.08-1.79, p = .01). Subgroup analysis found that ORs of studies in hemodialysis patients (OR = 4.89, 95% CI 2.54-9.90, p < .001) and acute ischemic stroke patients (OR = 1.60, 95% CI 1.14-2.25, p = .007) were higher than general population (OR = 1.15, 95% CI 1.03-1.29, p = .01). Studies from Europe (OR = 1.05, 95% CI 0.91-1.20, p = .51) yielded lower OR of endpoints compared with Asia (OR = 1.89, 95% CI 1.38-2.60, p < .001) and United States (OR = 1.43, 95% CI 1.19-1.72, p < .001). As a continuous variable, PTFV1 was also significantly associated with AF occurrence with a polled OR per 1 standard deviation (SD) change of 1.27 (95% CI 1.02-1.59, p = .03).
Conclusions: PTFV1 was significantly associated with the risk of AF and was considered to be a good predictor of AF occurrence in population with or without cardiovascular diseases.
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