Abstract
Background: The interatrial block is a condition that occurs due to the delay of conduction in the right atrium to the left atrium, and can be partial (pIAB) or advanced (aIAB), and also is associated with atrial arrhythmia. Diastolic dysfunction (DD) is an important condition frequently encountered in most healthy middle-aged individuals and plays a role in the development of many cardiovascular diseases. It is noteworthy that frequent paroxysmal AF (PAF) attacks are observed especially in individuals with DD in clinical life, and its relationship with the presence of interatrial block is still unclear in these patients. Our aim in this study was to evaluate the relationship between the presence of DD and the development of interatrial block and PAF.
 Methods: A total of 146; 92 patients with DD and 54 control (proven by echocardiography) were enrolled in this cross-sectional and prospectively study. The properties of the P wave were evaluated in leads D2-3 aVF and V1. Echocardiography and electrocardiography results of the two groups were compared. 
 Results: The mean age of the DD and the control group was (62.3 ± 0.74 and 61.2 ± 0.61 years, p=0.481) respectively. The frequency of IAB was significantly higher in the DD than the control group (%37-%46.7-%16.3, %77.8-%18.5-%3.7, none-pİAB-aİAB, respectively). In the correlation analysis, there was a strong correlation between the presence of DD and IAB (r: 0.439, p
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