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EKG MIDTERM
| Question | Answer |
|---|---|
| Continuous ECG monitoring done in a hospital setting with a small transmitter box is known as: | telemetry monitoring. |
| Which of the following topics is the least important for an ECG technician to understand? | Detailed evaluation of ECG results |
| The ________blank monitor allows the patient to participate in normal daily activities while the electrical activity of the heart is being recorded. | holter |
| ________blank means writing defamatory words. It is illegal and unethical and could result in the loss of your job. | Libel |
| Which device recognizes an abnormal rhythm and can deliver an electric shock to the heart if necessary? | AED |
| The valve located between the left atrium and left ventricle is the: | mitral (bicuspid) valve. |
| The tricuspid and mitral (bicuspid) valves are known as ________blank because they separate the atria from the ventricles. | atrioventricular (AV) valves |
| The ________blank valves separate the ventricles from the arteries leading to the lungs and body. | semilunar |
| The volume of blood ejected with each contraction is referred to as the: | stroke volume. |
| The "lubb" and "dupp" sounds you hear are made by the: | opening and closing of the heart valves. |
| The phase of the cardiac cycle when the heart is expanding and refilling, also known as the relaxation phase, is: | distole |
| What is the heart's response to stimulation of the vagus nerve? | it slows down |
| The function of the bundle branches is to: | conduct electrical impulses from the AV bundle to the left and right ventricles. |
| The SA node sends electrical impulses at a rate of: | 60 to 100 bpm |
| To estimate a person's cardiac output, you can: | multiply the heart rate by the stroke volume. |
| Which of the following actions occurs during systole? | The pulmonary and aortic valves open. |
| The structure that transfers an electrical impulse from the atria to the ventricles is the: | bundle of His. |
| The Einthoven triangle is formed by the following three limb leads: | right arm, left arm, left leg. |
| Which of the following is not a type of lead used in a 12-lead ECG? | Abdomen |
| Unipolar leads include all the lead types except | standard leads. |
| Signal processing, which occurs inside the ECG machine, | amplifies the electrical impulse. |
| The most commonly used paper speed on the ECG machine is: | 25mm/sec |
| When the paper speed is 25 mm/sec, how many boxes are present in a 1-minute recording? | 300 per min |
| When estimating the heart rate with the 6-second method, you locate 6 seconds on a rhythm strip, count the number of complexes, and multiply by: | 10. |
| How many leads does a multichannel recorder monitor at one time? | 12 |
| The process of studying a current ECG tracing along with older ECGs taken at intervals to note differences in a patient's condition is: | serial ECG comparison. |
| You are recording an ECG tracing on a female patient who has had a mastectomy. Your responsibilities include: | documenting this information on the ECG tracing. |
| If you record more than one ECG during a Code Blue emergency, it is important to note which of the following? | Indicate on tracing "repeat ECG-same lead placement" |
| Why are lead II or a modified chest lead the preferred leads for continuous cardiac monitoring? | These leads provide the best ability to view the P wave. |
| QRS duration measurement is essential to determine the time it takes for: | ventricular depolarization. |
| The normal PR interval measurement is: | 0.12 to 0.20 second |
| The normal range for the QRS complex duration is: | 0.06 to 0.10 second |
| If you can't identify an R wave on the ECG tracing, which of the following wave(s) can you use to determine the regularity of the ventricles? | Q and S wave junction |
| In determining the type of ECG rhythm the patient has, the ECG technician evaluates the components of the ECG rhythm strip, including all of the following except: | U wave |
| Depolarization of the cells causes the heart muscle to: | contract |
| The rapid change in polarization that occurs when the electrical charge is reversed across the cell membrane so that the inside of each cell is positively charged is referred to as: | action potential. |
| The state of cellular stimulation that precedes cardiac contraction is: | depolarization. |
| A complete ECG waveform is called a(n): | complex |
| On an ECG tracing, the period of time from the start of ventricular depolarization to the end of ventricular repolarization is the: | QT wave |
| The conduction of the electrical impulse through both ventricles appears on an ECG tracing as the: | S wave |
| The first positive wave in a normal QRS complex is the R wave, which represents conduction of the electrical impulse: | to the left ventricle |
| You are preparing to perform an ECG on a young woman when she tells you that she just had her blood tested and her blood potassium level is very low. What might you expect to see on the ECG tracing as a result of this? | heart rate will be slow |
| The U wave, which follows the T wave in an ECG tracing, represents: | repolarization of the Purkinje fibers and the bundle of His. |
| On the ECG tracing, what precedes and follows the sinus arrest period? | Complete cardiac complexes |
| What kind of impulse causes atrial dysrhythmias? | Ectopic |
| In a premature atrial complex (PAC), the P wave may be biphasic. This means that: | the waveform has both positive and negative deflections on the ECG tracing. |
| A cardiac cell or group of cells that produces an ectopic beat is known as a: | focus |
| WAP is a normal finding in children, older adults, and well-conditioned athletes. It may also be found in patients with: | organic heart disease and drug toxicity. |
| What is the rate of wandering atrial pacemaker rhythm (WAP)? | 60 to 100 bpm |
| What is the atrial rate in atrial flutter? | 250 to 350 bpm |
| Which rhythm is often a transient dysrhythmia that will lead to a more serious atrial dysrhythmia if not treated? | Atrial flutter |
| Some patients can tolerate the loss of atrial kick if the heart rate remains between: | 60 to 100 bpm |
| Which portion of the ECG tracing is primarily affected by atrial dysrhythmias? | P waves |
| What causes the different P wave morphologies in an ECG tracing that shows wandering atrial pacemaker? | The varying sites of the ectopic impulses |
| In junctional rhythms, where does the electrical current initiate? | AV junction |
| What symptoms will a patient have if PJCs occur more than four to six times per minute? | Hypotension, irregular pulse |
| Which of the following is a single early electrical impulse that originates in the AV junction, occurring before the next expected sinus impulse and causing an irregularity in the rhythm? | PJC |
| What are the distinguishing characteristics of junctional escape rhythm? | The rhythm is regular; the P wave may occur before, during, or after the QRS; and the P wave is inverted. |
| What symptoms might occur in a patient with junctional escape rhythm? | Hypotension, confusion, and disorientation |
| What is the ventricular heart rate with junctional tachycardia? | 100 to 180 bpm |
| Which of the following dysrhythmias is not considered part of the SVT classification? | Ventricular tachycardia |
| What symptom might a stable patient complain about when experiencing SVT? | Palpitations |
| What is the term for an ectopic focus originating above the ventricles in the atria or junctional region? | Supraventricular |
| Which dysrhythmia does not have a consistent PR interval that measures less than 0.12 seconds? | Supraventricular tachycardia |
| Which of the following originates from the AV junction? | Junctional escape rhythm |
| According to your patient's chart, she has junctional tachycardia and her normal resting heart rate is 86 bpm. Your ECG tracing shows a current resting heart rate of 148 bpm. What should you look for in this patient? | Signs and symptoms of low cardiac output |
| What is the primary difficulty in classifying an SVT? | Determining the origin of the tachycardia |
| What type of heart rate is characteristic of a patient who has junctional escape rhythm? | slower than normal |
| If the electrical impulse is initiated at the midpoint of the AV junction, where would you expect the P waves to appear on the ECG tracing? | Within the QRS complex |
| Which of the following is the best definition of reentry dysrhythmias? | Blockage or short circuit of the normal electrical conduction pathway |
Created by:
Lecia220