Medca EKG Practice 58 Questions with Verified Answers,100% CORRECT

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Medca EKG Practice 58 Questions with Verified Answers A device on the skin that picks up electrical impulses given off by the heart is known as - CORRECT ANSWER electrode The heart is located - ... CORRECT ANSWER on the left side of the chest The body returns oxygen-poor blood to the heart via the - CORRECT ANSWER vena cavae In lead l, activity of the heart is being measured from - CORRECT ANSWER the right arm to the left arm The human heart weighs approximately - CORRECT ANSWER 11 ounces What position should the patient be in for an ECG - CORRECT ANSWER supine Where is the chest electrode V2 located - CORRECT ANSWER at the fourth intercostal space at the left margin of the sternum Lead l, ll, lll are called - CORRECT ANSWER standard leads The right and left atrium are the __________chambers - CORRECT ANSWER receiving The atria contains what kind of blood - CORRECT ANSWER both oxygenated and deoxygenated blood The __________ valve separates the left ventricle from the aorta - CORRECT ANSWER aortic The __________ regulate the flow of blood into and out of the proper chambers - CORRECT ANSWER valves Which electrode is used as a ground reference - CORRECT ANSWER right leg The standard ECG consists of how many leads - CORRECT ANSWER 12 The contraction of the heart muscle is cause by the flow of ___________ through the muscle tissue - CORRECT ANSWER electrical impulse The __________ pressure is the pressure inside the arteries during ventricular contraction; when blood is pumped from the heart to the body - CORRECT ANSWER systolic The ECG tracing should be performed in a quiet environment because - CORRECT ANSWER interference is minimized (True or False) The ECG records the actual image of the heart - CORRECT ANSWER false The hardest working chamber if the heart is the - CORRECT ANSWER left ventricle What is the term used to refer to an electrocardiogram that is within normal limits - CORRECT ANSWER normal sinus rhythm The augmented leads are - CORRECT ANSWER unipolar The epicardium is the - CORRECT ANSWER outer layer of the heart wall The ability of the pacemaker cells of the heart to create an electrical impulse without being stimulated from another source - CORRECT ANSWER automaticity The precordial leads include - CORRECT ANSWER leads V1 to V6 The QRS complex represents - CORRECT ANSWER contraction of the ventricles The "rhythm strip" is usually lead - CORRECT ANSWER lead ll (True or False) An ECG can be used to determine blood pressure - CORRECT ANSWER false The heart has how many valves - CORRECT ANSWER four: mitral, tricuspid, aortic, pulmonic If the SA node does not simulate electrical impulses in the heart, this function is usually taken over by - CORRECT ANSWER AV node Which wave is the first wave of the cardiac cycle - CORRECT ANSWER p wave Which wave represents repolarization of the ventricles - CORRECT ANSWER t wave What are artifacts - CORRECT ANSWER interference picked up by the ECG machine (True or False) Patient psychology can be more important in obtaining a diagnostic ECG than the mechanics of administering ECG - CORRECT ANSWER true Name the condition in which the heartbeat is too rapid, and the rhythm is regular - CORRECT ANSWER sinus tachycardia The part of the conduction system of the heart that is conducting the impulses from the AV node to the ventricles is the - CORRECT ANSWER bundle of his Leads V5 and V6 show what view of the heart - CORRECT ANSWER Lateral If purkinje fibers produce the electrical impulse, the EKG would show a heart rate of - CORRECT ANSWER 20 - 40 bpm Infraction occurs when the heart muscle - CORRECT ANSWER is dead due to lack of oxygen What causes sinus bradycardia - CORRECT ANSWER dysfunction of the sinoatrial node; when the sinoatrial node fires less than less than 60 During atrial flutter, the atrial beats could fire as many as how many times per minute - CORRECT ANSWER 250 - 450 bpm Identify the true statement(s) about sinus tachycardia - CORRECT ANSWER - normal response to exercise, stress, fright, flight, anger - increased sympathetic tone with increased catecholamine release - beta blockers are useful treatment option if the cause is sympathetic overactivity In sinus arrhythmia, the heart rate is a variable dependent on - CORRECT ANSWER inspiration How is premature atrial contraction typically diagnosed - CORRECT ANSWER - electrocardiogram - holter monitor - cardiac event monitor Atrial flutter is categorized as the type l atrial flutter or type ll atrial flutter. Which statement below accurately describe type ll? - CORRECT ANSWER - It's faster than type l (349 - 440 bpm) - Different re-entry pathway than type l Why is atrial flutter fibrillation difficult to diagnose - CORRECT ANSWER - It may cause no symptoms - screening is not generally performed The right ventricle pumps oxygen-poor blood through the pulmonary artery to the - CORRECT ANSWER lungs The left ventricle pumps oxygen-rich blood through the aortic valve to the - CORRECT ANSWER tissues all over the body What is the name given to the modified myocardial cells that set the pace of the heart - CORRECT ANSWER SA node Where the blood exchanges carbon dioxide (CO2) for oxygen - CORRECT ANSWER lungs The muscular wall that separates the left and right side of the heart is the - CORRECT ANSWER septum Deoxygenated blood from the body returns to the heart, entering the - CORRECT ANSWER right atrium (True or False) ECG can be used to evaluate the function of the artificial pacemakers - CORRECT ANSWER true Cardiomegaly is - CORRECT ANSWER enlargement of heart The heart is made up of specialized muscle tissue called - CORRECT ANSWER myocardium The American Heart Association's color code for the lead wire to the right leg is - CORRECT ANSWER green Neurological pathways connect the heart with the __________ of the brain - CORRECT ANSWER medulla Diastole is when the heart muscle - CORRECT ANSWER relaxes Systole is when the heart muscle - CORRECT ANSWER contracts [Show More]

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