CRAT Exam 70 Questions with Verified Answers,100% CORRECT

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CRAT Exam 70 Questions with Verified Answers Cardiac Cycle - CORRECT ANSWER mechanical events that occur to pump blood Diastole - CORRECT ANSWER Ventricles Relax (Repolarize) and refills as Atri ... a contracts Rapid Filling Phase - CORRECT ANSWER Atria dumping blood to ventricles; pressure causes AV valves to open Diastasis - CORRECT ANSWER slowing of blood flow; pressure of atria and ventricles equalize Atrial Kick - CORRECT ANSWER Atria contracts/squeeze blood; P-wave S1 (LAB) - CORRECT ANSWER Ventricles Pressure High causes the AV valves to close Diastole and Systole - CORRECT ANSWER 2 Phases of Cardiac Cycle Systole - CORRECT ANSWER Ventricles pumps blood to body Isovolumetric Contraction - CORRECT ANSWER Ventricles squeeze but no blood flow happens yet; SL valves are still closed Ventricular Ejection - CORRECT ANSWER Pumping vigorously of ventricles; SL valves open and blood SHOOTs out of ventricles; half of blood empties Protodiastole - CORRECT ANSWER Pumping less; blood flow slows; pressure of ventricles, aortic and pulmonary all equalize Isovolumetric Relaxation - CORRECT ANSWER Ventricles Relax (Repolarize) S2 (DUB) - CORRECT ANSWER Closing of SL Valves; Ventricles low pressure, Aortic and Pulmonary High pressure Automaticity - CORRECT ANSWER Cell's ability to create an impulse w/o stimulation Conductivity - CORRECT ANSWER Cell's ability to pass impulse to neighboring cells Excitability - CORRECT ANSWER Cells ability to respond to stimulus by depolarizing; IRRITABILITY Contractility - CORRECT ANSWER Cells ability to contract and do work Rhythmicity - CORRECT ANSWER Cells ability to send electrical impulse in a regular and evenly paced manner Refractoriness - CORRECT ANSWER INABILITY of cell to respond to another electrical impulse AV valves (atrioventricular valves) - CORRECT ANSWER Tricuspid and Mitral (bicuspid) Valves SL valves (semilunar valves) - CORRECT ANSWER Pulmonary and Aortic Valves Coronary Arteries - CORRECT ANSWER Deliver/Supplies blood to the heart muscle RCA (Right Coronary Artery) - CORRECT ANSWER Supplies blood to R Atrium, R Ventricle, Bottom of L Ventricle, back of septum LCA (Left Coronary Artery) - CORRECT ANSWER Divides to LAD and Circumflex Circumflex Artery - CORRECT ANSWER Supplies blood to L Artery, side and back of L Ventricle LAD (Left Ant Descending) - CORRECT ANSWER "Widower"; Supplies blood to front and bottom of L Ventricle and front of septum Ischemia - CORRECT ANSWER 1st phase of M.I.: Lack of Oxyfen, ST depression Injury - CORRECT ANSWER 2nd phase of M.I.: Result of Ischemia; tall peaked Twaves and ST segment elevation Infarction - CORRECT ANSWER 3rd phase of M.I.: Necrosis of heart tissue; broad and deep Q wave Atherosclerosis - CORRECT ANSWER Plaque build-up in the inner lining of an artery causing it to narrow or become blocked CAD (Coronary Artery Disease) - CORRECT ANSWER Coronary arteries, that supplies the heart, becomes damaged, diseased, and blocked due to plaque build up. MI (myocardial infarction) - CORRECT ANSWER heart attack Angina - CORRECT ANSWER chest pain Sinus Exit Block - CORRECT ANSWER A pause that occurs when the SA node continues to fire but the impulse is blocked from getting to the atrial tissue. The result is one or more P-QRS-T sequence missing creating a pause. NOTE: When conduction returns, the sinus beat returns ON TIME. R-R is mapping Sinus Arrest - CORRECT ANSWER A pause that occurs when the SA node stops. Then when conduction returns, the beat will NOT be on time. Refractory Period - CORRECT ANSWER "Resistant to"; areas in QRS-T in w/c premature beat can cause a complete depolarization Absolute - CORRECT ANSWER No stimulus that will result in depolarization Relative - CORRECT ANSWER Strong impulse resulting in depolarization Supernormal - CORRECT ANSWER Weak signal can cause depolarization ECG Machine - CORRECT ANSWER Measures electrical impulse of the heart 12 Lead ECG - CORRECT ANSWER Complete picture of the heart; 10 lead wires= 6 chest, 4 limb leads Electrodes - CORRECT ANSWER small sensors placed on the skin to detect the electrical activity from the heart Leads - CORRECT ANSWER covered wires that conduct the electrical impulse from the electrodes to the ECG machine Einthoven's triangle - CORRECT ANSWER A triangle formed by the 3 standard limb leads: I, II, III Isoelectric - CORRECT ANSWER Flat line, no electrical current flowing 3 Standard Limb Leads - CORRECT ANSWER Bipolar Leads I, II, III Augmented Leads - CORRECT ANSWER Unipolar leads aVR, aVL, aVF Chest Leads (precordial leads) - CORRECT ANSWER Unipolar leads V1-V6 V1 - CORRECT ANSWER 4th intercostal space to the right of the sternum V2 - CORRECT ANSWER 4th intercostal space to the left of the sternum V3 - CORRECT ANSWER Between V2 and V4 V4 - CORRECT ANSWER 5th intercostal space, left midclavicular line V5 - CORRECT ANSWER 5th intercostal space, anterior axillary line V6 - CORRECT ANSWER 5th intercostal space, midaxillary line Multichannel Recorder - CORRECT ANSWER An ECG machine that monitors all 12 leads but records three leads at a time Input - CORRECT ANSWER Data entered into ECG Machine Signal Processing - CORRECT ANSWER the process within the ECG machine that amplifies the electrical impulse and converts it to waveforms Output Display - CORRECT ANSWER The part of the ECG machine that displays the tracing for the electrical activity of the heart, usually in a printed form on a 12-lead ECG machine. MAT (Multifocal Atrial Tachycardia) - CORRECT ANSWER Tachy of WAP EAT - CORRECT ANSWER Tachy of EAR PAT (paroxysmal atrial tachycardia) - CORRECT ANSWER PSVT Standard ECG Graph Paper - CORRECT ANSWER Measure amp and duration of electrical conduction of the heart Vertical - CORRECT ANSWER Voltage (mV); 1 small box= 0.01 mV Horizontal - CORRECT ANSWER Duration/Time (mm/sec); 1 small box= 0.04 sec Speed Control - CORRECT ANSWER 25 mm/ sec; regulates how fast/slow is the machine; increasing to 50 mm/sec result to wide ECG Tick Marks - CORRECT ANSWER Marks 3 sec intervals Gain Control - CORRECT ANSWER 10 mV; increases/decreases SIZE of amp 6 sec method - CORRECT ANSWER Irregular; #s of QRS x 10 1500 Method - CORRECT ANSWER Regular; 1500 divided by #s of small boxes between R-R 300 Method - CORRECT ANSWER 300 divided by # of large boxes between R-R [Show More]

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