CRAT Exam(Certified Rhythm Analysis Technician Prep)Already Solved 100% Pericardium - Answer Outer protective double-layered sac surrounding the heart.Epicardium - Answer Thin outermost layer of the heart, contains coronary arteries.Myocardium - Answer Middle muscular layer of the heart, contains electrical system.Endocardium - Answer Inner most layer of the heart, lines chambers and valves.Blood flow through the heart - Answer Venules --> Veins --> Superior/Inferior VC --> Rt atria --> Tricuspid Valve --> Rt ventricle --> Pulmonary valve --> Pulmonary Artery --> Lungs --> Pulmonary Veins --> Lt atria --> Bicuspid/Mitral valve --> Lt ventricle --> Aortic Valve --> Aorta --> Arteries --> Arterioles --> Capillaries --> Body Deoxygenated blood(left side of heart) - Answer Venules --> Veins --> Superior/Inferior VC --> Rt atria --> Tricuspid Valve --> Rt ventricle --> Pulmonary valve --> Pulmonary Artery Oxygenated blood(right side of heart) - Answer Pulmonary Veins --> Lt atria --> Bicuspid/Mitral valve --> Lt ventricle --> Aortic Valve --> Aorta --> Arteries --> Arterioles --> Capillaries Atrioventricular Valves(diastole) - Answer Valves between the atria and ventricles.Tricuspid, Bicuspid/Mitral. Regulates blood flow IN the heart.Semilunar Valves(systole) - Answer Pulmonary and Aortic valves separates Ventricles from corresponding artery. Regulates blood flow OUT of the heart.sinoatrial node (SA node) - Answer Primary pacemaker, 60-100bpm intrinsic rate atrioventricular node (AV) node - Answer 2nd pacemaker, 40-60bpm intrinsic rate Bundle of His - Answer normal connection between atria and ventricles bundle branches - Answer Branches off the Bundle of His that conduct impulses to the left and right ventricles Purkinje fibers - Answer conduction system terminates Automaticity - Answer The ability of the heart to generate and conduct electrical impulses on its own.Excitability - Answer ability of cardiac cell to respond to an impulse Conductivity - Answer The ability of cardiac cell to conduct/transmit an impulse.Contractility - Answer ability of cardiac cell to contract/pump in response to an electrical impulse.
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