Effect Of Vitamin D Status On Invasive Electrophysiologic Parameters and Atrial Fibrillation Inducibility

Abstract

INTRODUCTION: Deficiencies of Vitamin D (VitD) has been associated with coronary heart disease, hypertension and left ventricular hypertropy. However its effects on cardiac conduction system and atrial fibrillation (AF) predisposition has not been studied yet. In this study we aim to evaluate the effects of VitD on invasive electrophysiologic parameters and AF inducibility. METHODS: This retrospective cross-sectional study included 135 patients. Study population was divided into three group as VitD sufficient, VitD insufficient and VitD deficient according to baseline vitD levels. Patients' invasive electrophysiologic parameters and induced AF episodes were recorded. RESULTS: Corrected sinus node recovery time, baseline cycle length, atrial-His interval, His-ventricular interval and Wenckebach cycle length were lengthened in vitD deficient group but they didn't reach statistical significance. The rate of AF inducibility was twice as likely in VitD deficient group than sufficient group, however, it also didn't reach statistical significance. DISCUSSION AND CONCLUSION: Baseline VitD levels were not associated with cardiac electrophysiologic parameters and AF inducibility. To demonstrate the role of VitD in cardiac conduction system and AF inducibility thoroughly, further studies such as addressing VitD replacement are warranted.

Keywords

• vitamin d
• electrophysiologic parameters
• atrial fibrillation inducibility