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EKG HW 5&6

QuestionAnswer
What is evaluated and classified when determining dysrhythmias? Waves, segments, and intervals on the ECG tracing
QRS duration measurement is essential to determine the time it takes for: ventricular depolarization.
The shape of the P wave is analyzed to determine whether: all of the atrial current is moving in the same pathway.
Which of the following questions is necessary to analyze a P wave on an ECG tracing? Does each P wave have a QRS complex following it?
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.
The QRS complex represents the time it takes for: the ventricles to depolarize.
Measuring the PR interval requires the ECG technician to measure from the: beginning of the P wave to the beginning of the QRS complex.
f 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.
If a QRS complex measures 0.12 second or wider, it most likely indicates: delayed ventricular conduction.
What should you do if the patient you are monitoring is very pale and breathing very fast, yet his monitor indicates he is in normal sinus rhythm? Report his condition to a licensed practitioner immediately.
To determine the actual rhythm on an ECG tracing, the ECG technician: analyzes the characteristics of the rhythm and matches them to specific rhythm criteria
The part of the ECG tracing below that is circled in blue is the: PR interval.
The PR interval is measured from the: beginning of the P wave to the beginning of the QRS complex
The time from the beginning of atrial depolarization to the beginning of ventricular depolarization is shown on the ECG waveform as the: PR interval.
Depolarization of the cells causes the heart muscle to: contract.
The P wave represents: atrial depolarization.
The T wave represents: ventricular repolarization.
The state in which the inside of each heart cell is negatively charged and the outside is positively charged is: polarization.
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.
The straight, horizontal line on an electrocardiogram that occurs when the tracing is at zero and no deflections are occurring is called the: isoelectric line.
An interval on an ECG tracing is: he period of time between two activities within the heart.
A complete ECG waveform is called a(n): complex.
The QRS complex on an ECG tracing represents: ventricular depolarization and contraction.
On an ECG tracing, the period of time from the start of ventricular depolarization to the end of ventricular repolarization is the: QT interval.
The ST segment represents the time between ventricular depolarization and the beginning of ventricular repolarization.
he conduction of the electrical impulse through both ventricles appears on an ECG tracing as the: S wave.
A sudden loss of blood supply and oxygen to a region of heart tissue is known as: ischemia.
The first positive wave in a normal QRS complex is the R wave, which represents conduction of the electrical impulse: to the left ventricle.
Ventricular repolarization is represented on the ECG tracing by the: T wave.
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 The heart rate will be slow.
You are working in an outpatient facility that performs ECGs by appointment. You go to the lobby to call your next patient. The patient gets up and comes with you, but you notice that he is out of breath. When you ask, he tells you that he works only two Explain that you need to wait for his vital signs to return to normal before running the ECG.
The J point is the junction of the QRS interval and the ST interval.
Which of the following is not included in the QT interval? P wave
The U wave, which follows the T wave in an ECG tracing, represents: repolarization of the Purkinje fibers and the bundle of His.
The rapid change in polarization is known as ________blank. action potential
Repolarization of the cells causes the heart muscle to: return to their resting phase.
The QRS complex represents: ventricular depolarization.
Which of the following is a sign of ischemia? ST segment depression.
Where is the PR interval measured? From the beginning of the P wave to the beginning of the QRS complex.
What is the rate of a normal sinus rhythm? 60 to 100 bpm
Identify a rhythm using these criteria: regular rhythm, ventricular and atrial rates are 74 beats/minute, P wave precedes each QRS, PR interval and QRS duration within normal limits. Normal sinus rhythm
Which sinus rhythm has a rate of less than 60 beats per minute? Sinus bradycardia
Which of the following are common symptoms of low cardiac output? Shortness of breath, hypotension
The ECG tracing is considered a legal document and needs to be included in the patient's medical record. What four items must be on each ECG tracing? Patient's name, today's date and time, initials of the ECG technician
A patient with sinus bradycardia may require what type of treatment? Medication or a pacemaker
Which sinus rhythm has a rate of more than 100 beats per minute? Sinus tachycardia
Which of the following serves as the pacemaker in a normal heart? SA node
Sinus tachycardia may be a normal finding in people as a result of: exercise.
Sinus tachycardia is considered serious or life-threatening in patients who have had a recent: myocardial infarction.
What symptom do patients with sinus tachycardia often complain of? Palpitations
Which rhythm shows an irregularity during inspiration and expiration? Sinus dysrhythmia
he condition in which stimulation of the vagus nerve causes changes in heart rate is known as: vagal tone.
In which dysrhythmia do the P-P and R-R intervals progressively widen, and then narrow, following the patient's breathing pattern? Sinus dysrhythmia
n sinus dysrhythmia, if the heart rate decreases to 40 to 50 beats per minute, the patient may complain of: palpitations, dizziness.
Which dysrhythmia occurs when the SA node stops firing, causing a pause in electrical activity? Sinus arrest
What must occur if sinus arrest exceeds 6 seconds? Medical emergency procedures must be initiated.
Lack of blood supply to an area of tissue due to a blockage in the circulation to that area is known as: ischemia.
A condition in which the patient loses consciousness or faints is known as: syncope.
A condition in which no rhythm or electrical current travels through the cardiac conduction system is known as: asystole.
On the ECG tracing, what precedes and follows the sinus arrest period? Complete cardiac complexes
Sinus bradycardia has almost the same criteria as normal sinus rhythm; the only difference is that the: heart rate is slower.
Signs and symptoms of adequate cardiac output include: an alert and oriented patient.
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm? 1 Normal sinus rhythm
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?2 Sinus bradycardia
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?3 Normal sinus rhythm
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?4 Sinus tachycardia
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?5 Sinus arrest
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?6 Sinus dysrhythmia
You have performed an ECG on a patient, resulting in the following ECG tracing. How would you classify the patient’s rhythm?7 Sinus dysrhythmia
Which of the following is not characteristic of sinus tachycardia? The QRS duration is between 0.10 and 0.16 second.
Which of the following is a characteristic of sinus bradycardia? The heart rate is less than 60 beats per minute.
Which of the following statements about sinus dysrhythmia is true? The intervals between the P-P and R-R waves vary.
Which of the following patients is most likely to exhibit signs and symptoms of low cardiac output? A 48-year-old male with a heart rate of 52, whose tracing shows frequent periods of sinus arrest lasting 2.5 seconds
Which of the following is a characteristic of sinus arrest? The cardiac complexes before and after the sinus pause are usually regular.
In which rhythm does the SA node initiate an electrical impulse, but the impulse is not conducted to the atria? Sinus exit block
Sinus exit block and sinus arrest result in similar ECG tracings. The distinguishing factor is that in sinus exit block, the: pause duration is a multiple of the R-R or P-P interval.
What treatment may be needed for patients who have frequent episodes of sinus exit block with bradycardia? Temporary or permanent pacemaker
Which of the following conditions may result in sinus exit block? Acute myocardial infarction
Created by: PRILEN8176
 

 



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