The nurse is attempting to determine the ventricular rate and rhythm of a patient's telemetry strip. What should the nurse examine to determine this part of the analysis?
RR Interval
QT interval
PP interval
PR interval
The Correct Answer is A
A. RR Interval:
The RR interval is the time between two consecutive R waves on an electrocardiogram (ECG) strip. It is primarily used to determine the ventricular rate and rhythm of the heart. A regular RR interval suggests a regular heart rhythm, while irregular intervals may indicate arrhythmias or other cardiac abnormalities. Calculating the RR interval can help determine the heart rate (ventricular rate) by dividing 60 seconds by the RR interval in seconds (e.g., if the RR interval is 0.8 seconds, the heart rate would be approximately 75 beats per minute).
B. QT Interval:
The QT interval represents the time from the start of the Q wave to the end of the T wave on an ECG. It reflects the time it takes for the ventricles to depolarize and repolarize. Prolongation or shortening of the QT interval can indicate certain cardiac conditions or medication effects, including an increased risk of arrhythmias such as torsades de pointes. However, it is not directly used to determine ventricular rate and rhythm as the RR interval is.
C. PP Interval:
The PP interval is the time between two consecutive P waves on an ECG strip. It is primarily used to assess the atrial rate and rhythm. Regular PP intervals indicate a regular atrial rhythm, while irregular intervals may suggest atrial arrhythmias such as atrial fibrillation or atrial flutter. The PP interval is not directly used to determine ventricular rate and rhythm.
D. PR Interval:
The PR interval is the time from the start of the P wave to the start of the QRS complex on an ECG strip. It represents the time it takes for the electrical impulse to travel from the atria to the ventricles. A normal PR interval is typically between 0.12 to 0.20 seconds. Prolongation or shortening of the PR interval can indicate certain cardiac conduction abnormalities.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Furosemide 10mg IV bolus every 12 hours:
Furosemide is a loop diuretic commonly used in heart failure management to reduce fluid overload. The prescribed dose of 10 mg IV bolus every 12 hours is within the typical range for furosemide administration in acute heart failure.
B. Morphine sulfate 2 mg IV bolus every 2 hr PRN pain:
Morphine sulfate is often used in the management of acute pain, including pain associated with myocardial infarction. The prescribed dose of 2 mg IV bolus every 2 hours PRN for pain is appropriate and aligns with standard pain management protocols.
C. Laboratory testing of serum potassium upon admission:
It is common practice to perform laboratory testing, including serum potassium levels, upon admission for clients with acute heart failure, especially if they are receiving diuretics or other medications that can affect electrolyte balance. This prescription is appropriate and necessary for monitoring the client's condition.
D. 0.9% normal saline IV at 150 mL/hr continuous:
This prescription raises a concern because administering 0.9% normal saline at a rate of 150 mL/hr continuously may lead to fluid overload in a client with acute heart failure. The rate of IV fluid administration should be carefully assessed based on the client's fluid status, renal function, and hemodynamic parameters to avoid exacerbating heart failure symptoms.
Correct Answer is C
Explanation
A. 120/80 mm Hg or lower:
This blood pressure range is considered normal or optimal for most adults. However, for individuals diagnosed with hypertension, the goal is typically to reduce blood pressure to below 140/90 mm Hg, as maintaining normal blood pressure is not considered a goal for hypertension treatment unless specifically indicated based on individual circumstances.
B. Average of two BP readings of 150/80 mm Hg:
A blood pressure reading of 150/80 mm Hg is elevated and indicates hypertension, especially if consistently elevated across multiple readings. The goal of hypertension treatment is to lower blood pressure to below 140/90 mm Hg, so an average of 150/80 mm Hg would not be considered the goal of treatment.
C. 140/90 mm Hg or lower:
This blood pressure range is commonly recommended as the goal of treatment for individuals with hypertension who otherwise enjoy good health. It represents a balance between effective blood pressure control and minimizing the risk of side effects or complications associated with overly aggressive treatment.
D. 156/96 mm Hg or lower:
While a blood pressure reading of 156/96 mm Hg is elevated and indicates hypertension, the goal of treatment is typically to reduce blood pressure to below 140/90 mm Hg rather than targeting a specific numeric value below 156/96 mm Hg.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.