1. What is the location of the cardiac muscle? What are the layers of the cardiac muscle? 2. What is the function of the mitral valve? What is pericardial effusion? 3. What happens with left ventricle failure and what is it called? What role do the left and right ventricles play? 4. How do you calculate systemic vascular resistance? How do you calculate mean arterial pressure? 5. What is the indication for Atropine? What are the actions of beta-blockers and when are they used? n of the cardiac muscle?