Shunmuga Sundaram Ponnusamy1, Pugazhendhi Vijayaraman2. 1. Department of Cardiology, Velammal Medical College Hospital and Research Institute, Madurai, Tamil Nadu, India. shunmuga.pgi@gmail.com. 2. Geisinger Commonwealth School of Medicine, Geisinger Heart Institute, MC 36-10, 1000 E Mountain Blvd, Wilkes-Barre, PA, 18711, USA.