High-sensitivity cardiac troponin T (hsTnT) and N-terminal pro-brain natriuretic peptide (Nt-proBNP) will be measured as sensitive and specific markers of cardiac injury ⁄ strain ⁄ filling pressures and B-type natriuretic peptide levels correlate with AF burden in patients with lone AF and is a strong predictor of recurrent arrhythmia after ablation. (A stable fragment of vasoactive peptide, C-terminal -proendothelin-1 will be measured because of its relation recurrence of AF, which may be a risk factor for embolism and because of its possible role in the pathogenesis and recurrence of AF, and the association with atrial dilatation, fibrosis, and hypertrophy, which may contribute to AF persistence and embolism) C-Reactive protein (CRP) Interleukin-662-65 Routine blood tests: (Hb, Platelets, White blood cell count, Na, K, Creatinine, international normalized ratio (INR), thyroid-stimulating hormone (TSH), free-T4): only once before cardioversion.