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.