Medca EKG Practice Questions Questions & Answers | Questions with 100% Correct Answers | V, Exams of Medical Sciences

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Medca EKG Practice Questions Questions & Answers |

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A device on the skin that picks up electrical impulses given off by the heart is known as - Answer electrode The heart is located - Answer on the left side of the chest The body returns oxygen-poor blood to the heart via the - Answer vena cavae In lead l, activity of the heart is being measured from - Answer the right arm to the left arm The human heart weighs approximately - Answer 11 ounces What position should the patient be in for an ECG - Answer supine Where is the chest electrode V2 located - Answer at the fourth intercostal space at the left margin of the sternum Lead l, ll, lll are called - Answer standard leads The right and left atrium are the __________chambers - Answer receiving The atria contains what kind of blood - Answer both oxygenated and deoxygenated blood The __________ valve separates the left ventricle from the aorta - Answer aortic The __________ regulate the flow of blood into and out of the proper chambers - Answer valves Which electrode is used as a ground reference - Answer right leg The standard ECG consists of how many leads - Answer 12

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The contraction of the heart muscle is cause by the flow of ___________ through the muscle tissue - Answer electrical impulse The __________ pressure is the pressure inside the arteries during ventricularcontraction; when blood is pumped from the heart to the body - Answer systolic

The ECG tracing should be performed in a quiet environment because - Answer interference is minimized (True or False) The ECG records the actual image of the heart - Answer false The hardest working chamber if the heart is the - Answer left ventricle What is the term used to refer to an electrocardiogram that is within normal limits -Answer normal sinus rhythm

The augmented leads are - Answer unipolar The epicardium is the - 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 - Answer automaticity The precordial leads include - Answer leads V1 to V The QRS complex represents - Answer contraction of the ventricles The "rhythm strip" is usually lead - Answer lead ll (True or False) An ECG can be used to determine blood pressure - Answer false The heart has how many valves - Answer four: mitral, tricuspid, aortic, pulmonic If the SA node does not simulate electrical impulses in the heart, this function isusually taken over by - Answer AV node

Which wave is the first wave of the cardiac cycle - Answer p wave Which wave represents repolarization of the ventricles - Answer t wave What are artifacts - 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 - Answer true Name the condition in which the heartbeat is too rapid, and the rhythm is regular - Answer sinus tachycardia

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The part of the conduction system of the heart that is conducting the impulses from the AV node to the ventricles is the - Answer bundle of his Leads V5 and V6 show what view of the heart - Answer Lateral If purkinje fibers produce the electrical impulse, the EKG would show a heart rate of - Answer 20 - 40 bpm Infraction occurs when the heart muscle - Answer is dead due to lack of oxygen What causes sinus bradycardia - 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- Answer 250 - 450 bpm

Identify the true statement(s) about sinus tachycardia - 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 - Answer inspiration How is premature atrial contraction typically diagnosed - 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? - 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 - Answer - It may cause no symptoms- screening is not generally performed

The right ventricle pumps oxygen-poor blood through the pulmonary artery to the - Answer lungs The left ventricle pumps oxygen-rich blood through the aortic valve to the - Answer tissues all over the body What is the name given to the modified myocardial cells that set the pace of the heart - Answer SA node Where the blood exchanges carbon dioxide (CO2) for oxygen - Answer lungs

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The muscular wall that separates the left and right side of the heart is the - Answer septum Deoxygenated blood from the body returns to the heart, entering the - Answer rightatrium

(True or False) ECG can be used to evaluate the function of the artificial pacemakers

• Answer true Cardiomegaly is - Answer enlargement of heart The heart is made up of specialized muscle tissue called - Answer myocardium The American Heart Association's color code for the lead wire to the right leg is -Answer green

Neurological pathways connect the heart with the __________ of the brain - Answer medulla Diastole is when the heart muscle - Answer relaxes Systole is when the heart muscle - Answer contracts