The purpose of this study is to learn whether the chemicals in the blood and urine are different when the heart is atrial fibrillation compared to normal sinus rhythm.
Atrial Fibrillation variably activates the renin-angiotensin-aldosterone system (RAAS), stimulates the sympathetic nervous system, generates oxidant stress, produces natriuretic peptides, and increases ventricular rate. These are interrelated responses and the extent to which these or other pathophysiologic responses determine QT interval during and after Atrial Fibrillation (AF) is unknown. In this study, the QT variability is related to those potential markers in patients with AF undergoing elective DC-cardioversion.
Study Type
OBSERVATIONAL
Enrollment
219
Vanderbilt University Medical Center
Nashville, Tennessee, United States
QT variability before and after direct current cardioversion
Time frame: 1.5
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