Raja J Selvaraj1, Amarnath Upadhyay2. 1. Department of Cardiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India. Electronic address: raja.selvaraj@jipmer.edu.in. 2. Department of Cardiology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India.