ECON 100

Chapter 16 Cardiovascular Emergencies 1. Anatomy and Physiology  The heart is divided down the middle into two sides (left and right) by a wall called the septum. Each side of the heart has an atrium, or upper chamber, to receive incoming blood, and a ventricle, or lower chamber, to pump outgoing blood  Normal electrical impulses begin in the sinus node, which is in the upper part of the right atrium and is also known as the sinoatrial (SA) node. The impulses travel across both atr...