Dunwoody College Of Technology
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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...
A guide to students taking nursing
2015-16SIRSM