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HW 7&8 51-103
| Question | Answer |
|---|---|
| You are asked to perform an ECG on a 7-year-old child. The child is active and appears to be in good health. When you check the ECG tracing, you notice that it shows a wandering atrial pacemaker rhythm. What should you do? | Follow your facility's usual procedure for ECG reporting. |
| What is the normal, inherent rate of the AV node? | 40 to 60 bpm |
| Junctional rhythms occur because the electrical impulse comes from the AV junction instead of the ________ | SA node |
| In junctional rhythms, where does the electrical current initiate? | AV junction |
| What causes the inverted P wave morphology found with junctional rhythms? | Electrical impulses are coming from the AV node, causing atrial depolarization to flow retrogradely. |
| What does the term "retrograde" mean? | Backward |
| What are the distinguishing characteristics of PJCs? | They cause the underlying rhythm to be irregular; the P wave is inverted and may appear before, during, or after the QRS complex. |
| 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 type of rhythm occurs when the SA node fails to initiate the electrical activity and one of the backup pacemaker sites takes over? | Junctional escape rhythm |
| What is the ventricular heart rate for junctional escape rhythm? | 40 to 60 bpm |
| 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 range for accelerated junctional rhythm? | 60 to 100 bpm |
| What is the difference between accelerated junctional rhythm and junctional escape rhythm? | Heart rate |
| Why is it unlikely that a patient would have symptoms of low cardiac output with accelerated junctional rhythm? | The heart rate is the same as normal sinus rhythm. |
| What is the ventricular heart rate with junctional tachycardia? | 100 to 180 bpm |
| What is the difference between accelerated junctional rhythm and junctional tachycardia? | Heart rate |
| The effect of junctional tachycardia on the patient depends on ________ | The rate of the rhythm |
| What is the term for a fast, "fluttering" heartbeat sensation felt by a patient? | Palpitation |
| When is junctional tachycardia considered to be serious or life threatening? | After a recent myocardial infarction |
| Which of the following is one criterion for classifying a dysrhythmia as an SVT? | Heart rate between 150 and 250 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 |
| 76. Identify the following rhythm: | SVT |
| What is the origination point of an SVT? | Atria or junctional region |
| What might you be asked to do when a patient has a supraventricular dysrhythmia? | Increase the paper speed so the tracing can be analyzed more accurately |
| In terms of treating the patient, when a patient has a supraventricular tachycardia, when should the specific type of dysrhythmia be identified? | When the patient first complains of any signs or symptoms |
| What is the term for an ectopic focus originating above the ventricles in the atria or junctional region? | Supraventricular |
| What is the term for a condition in which a patient's blood pressure is not adequate to maintain good blood supply to the vital organs? | Hypotension |
| The PR interval can be measured only if the P wave occurs ________ the QRS complex. | Before |
| 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 |
| Which of the following treatments may be needed to terminate junctional tachycardia? | Medication |
| Wolff-Parkinson-White syndrome is an example of which type of dysrhythmia? | Reentry dysrhythmia |
| What is the primary difficulty in classifying an SVT? | Determining the origin of the tachycardia |
| Which of the following statements is true of all junctional dysrhythmias? | The QRS measurement is within normal limits. |
| What type of heart rate is characteristic of a patient who has junctional escape rhythm? | Slower than normal |
| You have recorded an ECG on a patient, and a portion of the tracing is shown here. What type of dysrhythmia does this patient have? | PJC |
| You have performed an ECG on a hospital patient who is known to be suffering from hypotension. A portion of the tracing is shown here. Which cardiac dysrhythmia is this? | Junctional escape rhythm |
| You are recording an ECG for a patient at a wellness clinic. The patient appears to be in good health and has no obvious signs or symptoms of heart trouble. A portion of the ECG tracing is shown below. What are your conclusions? | Accelerated junctional rhythm |
| You have performed an ECG on a patient who has come to the clinic complaining of "fluttering" in his chest. A portion of the ECG tracing is shown here. What type of dysrhythmia does this patient have? | Junctional tachycardia |
| You have performed an ECG on a hospital patient. A portion of the ECG tracing is shown here. What signs and symptoms would you expect this patient to have? | No obvious symptoms |
| A patient has an accelerated junctional rhythm. When you record the ECG, the tracing shows that the P waves follow the QRS complexes and that the distance from each P wave to the next R wave is 0.6 seconds. What is the PR interval? | The interval cannot be determined. |
| What is the collective term for the AV node and the surrounding tissue, including the bundle of His? | AV junction |
| 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 |
| Reentry dysrhythmias occur as a result of which of the following situations? | A blockage or short circuit in the normal electrical conduction pathway |
| How does the preexcitation of the ventricles in reentry dysrhythmias appear on an ECG tracing? | Delta wave |
| What is the underlying rhythm in the ECG tracing shown here? | Sinus rhythm |
| What type of rhythm would be present if abnormal impulses are ignored? | Underlying rhythm |
| Which of the following is the best definition of reentry dysrhythmias? | Blockage or short circuit of the normal electrical conduction pathway |
Created by:
PRILEN8176