CRAT Exam 38 Questions with Verified Answers,100% CORRECT

CRAT Exam 38 Questions with Verified Answers Pericardium - CORRECT ANSWER Outer protective double-layered sac surrounding the heart. Epicardium - CORRECT ANSWER Thin outermost layer of the heart, contains coronary ...

CRAT Exam 38 Questions with Verified Answers Pericardium - CORRECT ANSWER Outer protective double-layered sac surrounding the heart. Epicardium - CORRECT ANSWER Thin outermost layer of the heart, contains coronary arteries. Myocardium - CORRECT ANSWER Middle muscular layer of the heart, contains electrical system. Endocardium - CORRECT ANSWER Inner most layer of the heart, lines chambers and valves. Blood flow through the heart - CORRECT 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) - CORRECT ANSWER Venules --> Veins --> Superior/Inferior VC --> Rt atria --> Tricuspid Valve --> Rt ventricle --> Pulmonary valve --> Pulmonary Artery Oxygenated blood(right side of heart) - CORRECT ANSWER Pulmonary Veins --> Lt atria --> Bicuspid/Mitral valve --> Lt ventricle --> Aortic Valve --> Aorta --> Arteries --> Arterioles --> Capillaries Atrioventricular Valves(diastole) - CORRECT ANSWER Valves between the atria and ventricles. Tricuspid, Bicuspid/Mitral. Regulates blood flow IN the heart. Semilunar Valves(systole) - CORRECT ANSWER Pulmonary and Aortic valves separates Ventricles from corresponding artery. Regulates blood flow OUT of the heart. sinoatrial node (SA node) - CORRECT ANSWER Primary pacemaker, 60-100bpm intrinsic rate atrioventricular node (AV) node - CORRECT ANSWER 2nd pacemaker, 40-60bpm intrinsic rate Bundle of His - CORRECT ANSWER normal connection between atria and ventricles bundle branches - CORRECT ANSWER Branches off the Bundle of His that conduct impulses to the left and right ventricles Purkinje fibers - CORRECT ANSWER conduction system terminates Automaticity - CORRECT ANSWER The ability of the heart to generate and conduct electrical impulses on its own. Excitability - CORRECT ANSWER ability of cardiac cell to respond to an impulse Conductivity - CORRECT ANSWER The ability of cardiac cell to conduct/transmit an impulse. Contractility - CORRECT ANSWER ability of cardiac cell to contract/pump in response to an electrical impulse. Depolarization - CORRECT ANSWER contraction Repolarization - CORRECT ANSWER relaxation Waveform - CORRECT ANSWER P wave --> PR Interval --> QRS Complex --> J Joint --> ST Segment --> T wave P wave - CORRECT ANSWER atrial depolarization PR interval - CORRECT ANSWER Period of time from beginning of atrial depolarization to the beginning of ventricular depolarization. Delay of AV node to allow filling of ventricles. 0.12-0.20sec. QRS complex - CORRECT ANSWER ventricular depolarization J joint - CORRECT ANSWER the point where the QRS meets the ST segment. ST segment - CORRECT ANSWER early ventricular repolarization Vertical line on EKG - CORRECT ANSWER voltage Horizontal line on EKG - CORRECT ANSWER time T wave - CORRECT ANSWER ventricular repolarization Small box on ECG - CORRECT ANSWER 1mm or 0.04sec. Vertically = 0.1mV Large box on EKG - CORRECT ANSWER 5mm or 0.20sec. Vertically = 0.5mV 1500 method - CORRECT ANSWER Most accurate for use of regular rhythms. Count the number of small boxes between two R waves, them divide by 1500. R-R Interval/300 method - CORRECT ANSWER Less accurate method, count number of LARGE boxes between R waves and divide by 300 300 method for counting rate - CORRECT ANSWER 1 = 300, 2 = 150, 3 = 100, 4 = 75, 5 = 60, 6 = 50, 7 = 43, 8 = 38, 9 = 33, 10 = 30 sinus rhythm - CORRECT ANSWER 60-100bpm. P wave = present/upright. Normal heartbeat triggered by the SA node. Sinus Tachycardia - CORRECT ANSWER >100 bpm. P wave= present/upright Sinus Bradycardia - CORRECT ANSWER <60 bpm. P wave= present/upright Sinus Arrhythmia - CORRECT ANSWER 60-100bpm. P wave = present/upright.. IRREGULAR