Echelon quiz questions with complete solutions

When the sympathetic nerve fibers are stimulated, the heart rate is ____________. correct answer: elevated Electrode location sites should be rotated _______________ or when the pt is sweaty or has had a bath. correct answer: q24h What method is used to calculate atrial and ventricular rate for irregular rhythms? correct answer: 6 second rule T or F: The qrs complex in MCL1 can be negative and still be normal. correct answer: T A wave form is a movement ______________ the isoelectric line in either a positive or negative direction. correct answer: away from Lead II is helpful in detecting.... correct answer: sinus node and atrial arrhythmias What affects preload: volume in the veins, pressure in the arteries or ventricles, or volume of blood in the ventricles? correct answer: volume in the veins Along with Lead II, lead III is most helpful in monitoring changes in what part of the heart? correct answer: Inferior wall MI What are the best areas to place electrodes? correct answer: on soft tissue The ekg produces an upright pattern on the paper in response to electrical activity in the heart flowing towards a correct answer: positive electrode The QT interval represents correct answer: total ventricular activity What are the AV valves? correct answer: mitral and tricuspid What part of the EKG reflects the refractory period? correct answer: The QRS to the peak of the T wave 5 large EKG strip boxes totals how much time? correct answer: 1 second The PRI is considered abnormal or prolonged if it is correct answer: 0.20 secs What is the most common cause for an alarm sounding? correct answer: a loose lead wire Which lead is the most useful for routine monitoring and monitoring the sinus node? correct answer: Lead II Which lead is helpful in monitoring atrial rhythms and hemiblocks? correct answer: Lead I What is the normal measurement of a QRS complex? correct answer: 0.04-0.10 What are EKG artifacts? correct answer: false cardiac waveforms What is the first step in preparing a pt for an EKG? correct answer: reassuring the pt and maintaining privacy What are the factors that impact afterload? correct answer: arterial contractility, pressure, and resistance What is released when the parasympathetic nerve fibers are stimulated? correct answer: acetylcholine Which lead is helpful in assessing bundle branch defects and confirming pacemaker wire placement? correct answer: MCL1 Normal Sinus rhythm has a HR of correct answer: 60-100 Afib, Aflutter, and ____________ are examples of SVT correct answer: junctional tachycardia What rhythm shows a normal rate, normal QRS and PRI durations, and an absent beat or beats? correct answer: sinus pause What wave might not be visible if the pt presents w/ sinus tachycardia? correct answer: t wave In sinus arrhythmia, which interval remains regular correct answer: PRI What is the most common type of rhythm in SVT? correct answer: paroxysmal SVT You would not see a normal _______________ interval on an EKG strip with SVT. correct answer: PR When you have a regular atrial and ventricular rhythm and a normal QRS and PRI and the atrial and ventricular rate is between 100-150 bpm, this rhythm would be ID'd as correct answer: sinus tachycardia What is the appropriate tx for a stable pt with afib and a controlled ventricular response? correct answer: admin anticoagulants and antiarrhythmics What is the heart's electrical activity dominated by? correct answer: the sa node In sinus bradycardia, the atrial and ventricular rate is correct answer: 40-60 bpm A pt is ID'd as having an uncontrolled ventricular rate when aflutter is accompanied by a ventricular rate ________________ correct answer: 100 What rhythm is initiated by the SA node and transmitted through the atria, AV junction, bundle branches, and purkinje fibers? correct answer: Sinus Sinus tachycardia is defined as sinus rhythm at a rate of correct answer: 100-150 bpm When atropine is ineffective for sinus bradycardia, what would be your next intervention? correct answer: transcutaneous pacing What is one of the primary concerns for a pt presenting w/ afib? correct answer: Controlling the ventricular rate To be ID'd as accelerated junctional rhythm, the ventricular rate must reach ________________ correct answer: 60-100 bpm The criteria for ID'ing a rhythm as SVT includes correct answer: a very rapid ventricular rate a QRS complex within normal limits What is the one EKG characteristic where normal sinus rhythm differs from sinus arrhythmia? correct answer: The distance between the Ps and the Rs What is the key identifier for a PAC? correct answer: an early P wave From what pacemaker site do junctional rhythms originate? correct answer: the AV node The sudden onset or cessation of an arrhythmia is called correct answer: paroxysmal What are the possible tx options for a stable symptomatic patient with junctional tachycardia? correct answer: Admin adenosine, O2, ensure IV access A PJC would not display which EKG characteristic? correct answer: a wide QRS 0.10 secs T or F: Any ectopy should be cause for concern in healthy people correct answer: F A way to determine if you are looking at a junctional or atrial rhythm is to look at the ________ wave correct answer: P T or F: PACs need to be counted in the underlying rhythm. correct answer: F What is the name of the rhythm with an atrial rate of 250 bpm , a non measurable PRI, and a ventricular rate of 120 bpm? correct answer: Aflutter with uncontrolled ventricular rate What arrhythmia are you more likely to see in infants, children, the elderly, and patients on mechanical ventilation? correct answer: sinus arrhythmia What med is the first line tx for symptomatic SVT? correct answer: adenosine What would a premature beat that starts in the atria and follows an abnormal pathway through the ventricles be called? correct answer: an aberrantly conducted PAC