Ostium Johnson Francis | July 6, 2008 | General | No Comments Ostium Ostium: Opening, usually of a blood vessel. Related Posts Left sided chest pain No Comments | Aug 31, 2017 Risk factors for heart disease No Comments | Feb 23, 2017 ECG Simplified – Part 7 No Comments | May 27, 2022 Levocardia No Comments | Jul 10, 2008 About The Author Johnson Francis Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal