The goal of this clinical trial is to answer the research question whether hs Troponin I and NT-proBNP have a role in detecting atrial fibrillation in patients with pacemakers. Objectives of the study: 1. To survey some risk factors for atrial fibrillation in patients with permanent pacemakers. 2. To determine the role of hs Troponin I and NT-proBNP in predicting new-onset atrial fibrillation within follow-up time. 3. To build a model to predict the prognosis of atrial fibrillation based on the detected subclinical markers related to atrial fibrillation and classic cardiovascular risk factors.
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Atrial fibrillation
Timeframe: through study completion, an average of 2 year