Sinus node Johnson Francis | July 6, 2008 | General | No Comments Sinus node Sinus node: Same as sino-atrial node or SA node; the normal pacemaker of the heart. Related Posts Why would a 12 yr old girl have a heart attack? No Comments | Apr 15, 2013 Some physical activity is better than none No Comments | Aug 4, 2011 What is the use of nitroglycerine? No Comments | Jul 24, 2008 What are the potential problems in stem cell therapy for heart disease? No Comments | Jul 4, 2008 About The Author Johnson Francis Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal