basic function of heart

Help  This week's assignment is a 2-page (at minimum) paper regarding the basic function of the heart, its' electrical system, and why an AED is an effective treatment for sudden cardiac arrest. The major focus of this paper should be on the electrical system and the AED treatment. Therefore, only a brief summary of the heart's anatomy and function is needed. You are required to include at least two cited academic references (beyond our course resources) that support your work. Keep in mind however, the content should represent your understanding and not be simply copy and pasted from online sources. Use of visual images is encouraged to help clarify any complicated content.