A 65 year old woman with ASCVD is complaining of palpitations for last 4 hours. On examination her hea rate is 180/min with BP= 90/60 mmHg. Neck veins are full. On auscultation carotid aery Bruit is present with loud S1 and narrow split S2. Chest has bilateral basal crepitations. Which of the following is not recommended for this patient?