Medca EKG Practice Question Set - Test-Ready Solutions Pack

Medca EKG Practice Question Set - Test-Ready Solutions Pack 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 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 ventricular contraction; 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 V6 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 is usually 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 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