Nur 0013Spring 2014Chapter 18 – HeartLearning Objectives1.Differentiate between the systemic and pulmonary circuits.2.Know the major structures and functions of heart anatomy that we discussedExternally Location in mediastinumApex and BaseKnow the layers and functions of the pericardium and heart wall.Know the right and left coronary arteries and the branches from each one.InternallyKnow the locations of the valves.Know how the chordae tendinae and papillary muscles work in the AV valves,compared to the functioning of the semilunar valves.3.Take a red blood cell from the inferior vena cava to the aorta through all the structures of the heart.4.Electrical propertiesHow cardiac muscle cells are connected to one another and why is this important?Know the difference and significance of the action potential generation in skeletalmuscle vs. cardiac muscle cells. What ion is responsible for the slow repolarization of cardiac muscle tissue?5.Know the electrical conduction systemKnow the order of action potential generation.SA nodeAV nodebundle branches Purkinje fibers6.Know the ECG waveWhat does it record?What are the P, QRS and T waves? – what do they represent?What are the PR and QT intervals? – what do they represent?7.Cardiac cycleGo over the Wigger’s diagramKnow the major events that happen in each phase of the cycle.8.Be able to calculate CO.CO = SV * HRWhat are SV and HR?What are some factors that influence CO?What is preload?1
Nur 0013Spring 2014TermsIVC – Inferior Vena CavaSVC – Superior Vena CavaAV – Atrioventricular Valve, also Atrioventricular nodeSL – Semilunar ValveSA – Sinoatrial nodeRA/LA – Right Atrium/Left AtriumRV/LV – Right Ventricle/Left VentricleI.Anatomy and Blood FlowA.General ConsiderationsCardiovascular System - heart, blood vessels, and bloodHeart is a double pump that pushes blood through 2 circuits at once. Pulmonary – Systemic –The circulatory system serves to bring fresh gases and nutrients to the tissues and to remove wastes from tissues, also important in transporting substances (e.g. hormones, antibodies).