ECG Chapter 5 A

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  • 1/30 Questions

    The ability to evaluate an ECG waveform is an important skill for many health professionals

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ECG Chapter 5 A - Quiz
About This Quiz

ECG chapter 5 A explores essential skills in interpreting ECG waveforms, focusing on dysrhythmias, rhythm strip analysis, and characteristics of Normal Sinus Rhythm. This quiz enhances the ability to assess cardiac health, crucial for healthcare professionals.

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  • 2. 

    What is evaluated and classified when determining dysrhymias?

    • Waves, segments and intervals on the ECG tracing

    • Rhythm, rate and P wave configuration

    • PR interval, QRS duration and configuration

    Correct Answer
    A. Waves, segments and intervals on the ECG tracing
    Explanation
    When determining dysrhythmias, the evaluation and classification are based on analyzing the waves, segments, and intervals on the ECG tracing. This involves examining the different components of the ECG, such as the P wave, QRS complex, and T wave, as well as the durations and configurations of these waves. By assessing these features, healthcare professionals can identify any abnormalities or irregularities in the heart's electrical activity, which helps in diagnosing and classifying dysrhythmias.

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  • 3. 

    What rhythm originating in the sinus node is considered " normal"? p128

    Correct Answer
    sinus rhythm
    Explanation
    Sinus rhythm is considered "normal" because it originates in the sinus node, which is the natural pacemaker of the heart. It is characterized by a regular heartbeat with a consistent rate and rhythm. Sinus rhythm indicates that the electrical impulses in the heart are functioning properly and that the heart is beating in a healthy and efficient manner.

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  • 4. 

    Five-step process of gathering data about each rhythm strip (P121)

    Correct Answer
    rhythm, rate, P wave configuration, PR interval, QRS duration and configuration
    Explanation
    The five-step process of gathering data about each rhythm strip includes analyzing the rhythm, determining the rate, examining the P wave configuration, measuring the PR interval, and evaluating the QRS duration and configuration. This process allows for a comprehensive assessment of the rhythm strip, providing important information about the electrical activity of the heart.

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  • 5. 

    A regular rhythm has 19 small boxes between the P-P interval. What is the heart rate?

    Correct Answer
    1500/19=79
    Explanation
    The given calculation is dividing 1500 by 19, resulting in 79. This suggests that the heart rate is 79 beats per minute.

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  • 6. 

    After you measure QRS duration and configuration, what other questions need to be answered? (P121)

    Correct Answer
    Are all the QRS complexes of equal length? What is the actual measurement, and is it within the normal limits? Do all QRS complexes look alike, and are the unusual QRS complexes associated with an ectopic beat?
    Explanation
    The correct answer provides a list of additional questions that need to be answered after measuring QRS duration and configuration. These questions include whether all the QRS complexes are of equal length, what is the actual measurement of the QRS duration, whether it falls within the normal limits, whether all QRS complexes look alike, and whether any unusual QRS complexes are associated with an ectopic beat. These questions help to further assess the QRS complexes and determine if there are any abnormalities or irregularities present.

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  • 7. 

    What's Unique about Normal Sinus Rhythm? (P122)

    Correct Answer
    Sinus rhythm is the only rhythm for which all five steps are within normal limits
    Explanation
    Sinus rhythm is considered normal because it follows a specific pattern in the heart's electrical activity. The five steps referred to in the answer likely pertain to the five components of a normal sinus rhythm: the P wave, the QRS complex, the PR interval, the QT interval, and the RR interval. These components represent the different phases of the heart's electrical cycle, and in a normal sinus rhythm, they all fall within normal limits. Other rhythms may have abnormalities or variations in one or more of these components, making sinus rhythm unique in its adherence to normal limits for all five steps.

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  • 8. 

    The patient you are monitoring is very pale and appears to be breathing very fast. His monitor indicates a sinus rhythm. What should you do? (P123)

    Correct Answer
    report the symptoms to the supervisor immediately, the patient shows signs of decreased cardiac output which shows pale skin and difficulty breathing
    Explanation
    The correct answer is to report the symptoms to the supervisor immediately because the patient is showing signs of decreased cardiac output, such as pale skin and difficulty breathing. These symptoms indicate a potential medical emergency and require immediate attention from a supervisor or healthcare professional.

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  • 9. 

    What's Unique 独特 about Sinus Bradycardia? (P124)

    Correct Answer
    for sinus bradycardia, the heart rate is less than 60 and all other measurements are within normal limits
    Explanation
    Sinus bradycardia is characterized by a heart rate that is less than 60 beats per minute, while all other measurements, such as blood pressure and rhythm, are within normal limits. This means that despite the slower heart rate, the electrical impulses in the heart are originating from the sinus node, which is the normal pacemaker of the heart. Other potential causes of bradycardia, such as heart block or abnormal rhythms, are not present in sinus bradycardia.

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  • 10. 

    What's Unique 独特 about Sinus Tachcardia? (p125)

    Correct Answer
    for sinus tachycardia, the heart rate is greater than 100 and all other measurements are within normal limits
    Explanation
    Sinus tachycardia is considered unique because it is characterized by a heart rate that exceeds 100 beats per minute, while all other measurements, such as blood pressure and rhythm, remain within normal limits. This means that despite the increased heart rate, the heart's electrical system is functioning properly, and there are no other abnormalities or irregularities in the heart's activity.

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  • 11. 

    What's Unique about sinus dysrhymia?(P126)

    Correct Answer
    for sinus dysrhymia, the P-P and R-R intervals will progressively widen then narrow following the patient's breathing pattern
    Explanation
    Sinus dysrhythmia is a condition characterized by an irregular heart rhythm that is influenced by the patient's breathing pattern. In this condition, the P-P and R-R intervals, which represent the time between consecutive atrial and ventricular contractions respectively, will vary in duration. Specifically, during inspiration, the intervals will progressively widen, meaning they will become longer. Conversely, during expiration, the intervals will narrow, meaning they will become shorter. This pattern of widening and narrowing intervals is unique to sinus dysrhythmia and is a result of the interaction between the respiratory and cardiovascular systems.

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  • 12. 

    What Unique about sinus areest? P128

    Correct Answer
    during sinus arrest, after the pause P waves and QRS complexes come back normal
    Explanation
    During sinus arrest, the normal electrical activity in the sinus node, which is responsible for initiating the heart's electrical impulses, temporarily stops. This results in a pause in the heart's rhythm. However, once the sinus node resumes its normal function, the P waves and QRS complexes, which represent the electrical activity of the atria and ventricles respectively, return to their normal pattern. This distinguishes sinus arrest from other arrhythmias where the P waves and QRS complexes may be abnormal or absent during the episode.

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  • 13. 

    What two rhythms originating in the sinus node is affected by the breathing patter? p128

    Correct Answer
    Sinus Dysrhythmia
    Explanation
    Sinus dysrhythmia is a condition characterized by irregular heartbeats that originate from the sinus node, the heart's natural pacemaker. The breathing pattern has a direct effect on sinus dysrhythmia because the heart rate tends to increase during inhalation and decrease during exhalation. This is due to the stimulation of the vagus nerve, which is responsible for regulating heart rate. Therefore, the two rhythms originating in the sinus node affected by the breathing pattern in sinus dysrhythmia are the increased heart rate during inhalation and decreased heart rate during exhalation.

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  • 14. 

    What two rhythms originating in the sinus node only affect the heart rate and how is it affected?

    Correct Answer
    Bradycardia affects the heart rate by being lower than 60 and Trachycardia affects the heart rate by being high than 100
    Explanation
    Bradycardia and tachycardia are two rhythms originating in the sinus node that only affect the heart rate. Bradycardia refers to a heart rate lower than 60 beats per minute, while tachycardia refers to a heart rate higher than 100 beats per minute. In bradycardia, the heart rate is slowed down, which can lead to symptoms such as fatigue, dizziness, and fainting. On the other hand, in tachycardia, the heart rate is increased, which can cause symptoms like palpitations, shortness of breath, and chest pain. Both rhythms can have significant effects on the heart's ability to pump blood effectively.

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  • 15. 

    A patient is in sinus arrest lasts longer than 6 seconds. This indicated that no electrical current is traveling through the cardiac conduction system and is known as asystole. What should you do? (note A6)

    Correct Answer
    sinus arrest over 6 seconds is considered asystole and life threatening, CPR and Code Blue is required
    Explanation
    Sinus arrest refers to the temporary cessation of electrical activity in the sinus node of the heart, which is responsible for initiating the heartbeat. When sinus arrest lasts longer than 6 seconds, it is considered asystole, which is the absence of any electrical activity in the heart. Asystole is a life-threatening condition as it indicates the complete absence of a heartbeat. In such cases, immediate intervention is required. CPR (Cardiopulmonary Resuscitation) should be initiated to manually circulate blood and oxygen to vital organs. Additionally, a Code Blue should be called, which is a hospital emergency code that alerts healthcare providers to respond immediately to a cardiac arrest situation.

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  • 16. 

    What's Unique about premature atrial complexes? P130

    Correct Answer
    a premature atrial complex is a beat earlier than is should be with a positively defected P wave
    Explanation
    Premature atrial complexes (PACs) are abnormal heartbeats that occur earlier than they should. They are characterized by a positively deflected P wave on an electrocardiogram (ECG). The P wave represents the electrical activity of the atria, and a positive deflection indicates that the electrical impulse is originating from a different location within the atria. This can be caused by various factors such as stress, caffeine, or heart disease. Identifying PACs on an ECG can help diagnose and monitor heart conditions.

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  • 17. 

    What's unique about wandering atrial pacemaker rhythm? 131

    Correct Answer
    WAP has a changing P wave configuration with at least three variation in one lead. the rhythm may be irregular
    Explanation
    Wandering atrial pacemaker rhythm (WAP) is unique because it exhibits a changing P wave configuration with at least three variations in one lead. Additionally, the rhythm of WAP may be irregular. This means that the electrical activity originating from the atria is not consistent and can vary in shape and timing, leading to an irregular rhythm.

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  • 18. 

    What's unique about multifocal atrial tachycardia? 132

    Correct Answer
    MAT has a clearly changing P wave and a heart rate of 101 to 150 beat per minute
    Explanation
    Multifocal atrial tachycardia (MAT) is unique because it is characterized by a clearly changing P wave and a heart rate ranging from 101 to 150 beats per minute. Unlike other types of tachycardia, MAT shows variability in the shape and morphology of the P wave on an electrocardiogram. This is due to the presence of multiple ectopic atrial foci, causing the atria to depolarize from different locations. The varying P wave morphology and increased heart rate are key features that differentiate MAT from other cardiac arrhythmias.

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  • 19. 

    What's unique about atrial flutter? 133

    Correct Answer
    atrial flutter has a "sawtooth" atrial pattern between the QRS complexes
    Explanation
    Atrial flutter is unique because it displays a distinct "sawtooth" pattern in the atrium between the QRS complexes. This pattern is characterized by rapid and regular atrial contractions that occur at a rate of around 250-350 beats per minute. The sawtooth appearance is caused by the rapid and organized electrical activity in the atria, which results in a characteristic flutter wave on the electrocardiogram (ECG). This is in contrast to other arrhythmias, where the atrial pattern may be irregular or absent.

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  • 20. 

    What are the rate and the origination point of a supraventricular tachycardia? p140

    Correct Answer
    The rate is 150 to 350 and it starts in either the SA node, AV junction, or Atria
    Explanation
    Supraventricular tachycardia (SVT) is a condition characterized by a rapid heart rate originating above the ventricles. The rate of SVT typically ranges from 150 to 350 beats per minute. SVT can start in three different locations: the sinus node (SA node) which is the normal pacemaker of the heart, the atrioventricular (AV) junction which is the connection between the atria and ventricles, or the atria themselves. Therefore, the correct answer states that the rate of SVT is 150 to 350 and it can start in either the SA node, AV junction, or atria.

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  • 21. 

    Name the dysrhythmias associated with supraventricular tachycardia. p140

    Correct Answer
    Sinus tachycardia, atrial flutter, atrial fibrillation, junctional tachycardia
    Explanation
    The dysrhythmias associated with supraventricular tachycardia include sinus tachycardia, atrial flutter, atrial fibrillation, and junctional tachycardia.

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  • 22. 

    What's unique about atrial fibrillation? 134

    Correct Answer
    atrial fifbrillation shows chaotic disorganized activity between QRS complexes
    Explanation
    Atrial fibrillation is unique because it demonstrates chaotic and disorganized activity between QRS complexes. This irregularity in the heart's electrical signals causes the atria to quiver instead of contracting normally. As a result, the heart's pumping function is compromised, leading to symptoms such as palpitations, shortness of breath, and fatigue. This condition requires medical intervention to restore a regular heart rhythm and prevent potential complications like blood clots and stroke.

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  • 23. 

    The patient has coronary artery disease. How would you expect PAC to affect this patient? 135

    Correct Answer
    it shows signs low cardiac output
    Explanation
    The given answer suggests that PAC (Pulmonary Artery Catheter) would affect the patient by showing signs of low cardiac output. This means that the patient's heart is not pumping enough blood to meet the body's demands. Coronary artery disease is a condition that narrows or blocks the blood vessels supplying the heart, leading to reduced blood flow. This can result in decreased cardiac output. Therefore, it is expected that PAC would indicate signs of low cardiac output in a patient with coronary artery disease.

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  • 24. 

    What treatment is usually indicated for patients with atrial flutter? 135

    Correct Answer
    oxygen therepy and careful monitoring
    Explanation
    Patients with atrial flutter often experience a rapid and irregular heartbeat, which can lead to symptoms like shortness of breath and chest discomfort. Therefore, the treatment usually indicated for these patients includes oxygen therapy to improve oxygen levels in the blood and careful monitoring to assess their heart rate and rhythm. Oxygen therapy helps alleviate symptoms by increasing the amount of oxygen available to the body, while careful monitoring ensures that any necessary interventions can be promptly initiated if the patient's condition worsens.

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  • 25. 

    Is MAT rhythm considered a serious why? 135

    Correct Answer
    Multifocal atrial tachycardia is can start emphysema, CHF or acute mitral valve requrgitation
  • 26. 

    What is Wandering atrial pacemaker? 131

    Correct Answer
    it is very common finding in children, older adult and athletes
    Explanation
    Wandering atrial pacemaker refers to a condition where the pacemaker cells in the heart, responsible for initiating electrical signals, shift their location within the atria. This results in the generation of electrical impulses from different areas of the atria, causing the heart rhythm to vary. It is commonly observed in children, older adults, and athletes due to the physiological changes that occur in their hearts. This condition is usually benign and does not require treatment unless it causes symptoms or leads to other cardiac issues.

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  • 27. 

    What's unique about Permature Junctional Complex? 136

    Correct Answer
    PJC have an irregular rhythm and the P wave is inverted and may appear before, during, or after the QRS complex
    Explanation
    PJC, or Premature Junctional Complex, is unique because it has an irregular rhythm and the P wave is inverted. Additionally, the P wave may appear before, during, or after the QRS complex.

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  • 28. 

    What are differences between a Premature junctional contractin(PJC) rhythm and a junctional rhythm?137

    Correct Answer
    PJC is irregular rhythm, and junctional rhythm is regular and similar interval P-P and R-R interval
    Explanation
    The explanation for the given correct answer is that a Premature Junctional Contraction (PJC) rhythm is irregular, meaning that the timing between the contractions is inconsistent. On the other hand, a junctional rhythm is regular, with consistent intervals between contractions. Additionally, in a junctional rhythm, the P-P interval (the time between atrial contractions) and the R-R interval (the time between ventricular contractions) are similar in duration.

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  • 29. 

    What's unique about supreaventricular dysrhythmias? 139

    Correct Answer
    supraventricular dysrhymias are rate dependent with a rate of greater than 150 beats per minute
    Explanation
    Supraventricular dysrhythmias are unique because they are rate dependent, meaning that they occur when the heart rate is greater than 150 beats per minute. This distinguishes them from other types of dysrhythmias that may not be rate dependent.

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  • 30. 

    What might you be asked to do when a patient has a supraventricular dysrhythmia? p140

    Correct Answer
    Speed up the paper for the liscenced practitioner

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  • Mar 21, 2023
    Quiz Edited by
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  • Apr 22, 2011
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