Authors:
Dr. Satyendra Tewari, Professor, Department of Cardiology, SGPGI, Lucknow, Uttar Pradesh. E-mail- stewari_sgpgi@yahoo.com
Dr. Abhijit Bharali, Senior Resident, Department of Cardiology, SGPGI, Lucknow, Uttar Pradesh. E-mail- dr.abhijitbharali@gmail.com