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 ["1"]
Explanation
If the nurse needs to administer vancomycin 500 mg PO daily divided into four equal doses, and the available capsules are vancomycin 125 mg each, the nurse would administer:
500 mg total daily dose ÷ 4 doses = 125 mg per dose
Since each capsule contains 125 mg of vancomycin, the nurse would administer 1 capsule with each dose.
Correct Answer is A
Explanation
A. Monitor weight daily: Daily weight monitoring is a crucial aspect of assessing fluid balance in clients with heart failure. Sudden weight gain can indicate fluid retention, which may be a sign of worsening heart failure. The nurse should instruct the client to weigh themselves at the same time each day, preferably in the morning after emptying the bladder and before eating breakfast, and to report any significant weight changes to their healthcare provider.
B. Assess radial pulses daily: While assessing radial pulses is important for monitoring cardiovascular status, it is not specifically focused on assessing fluid balance in heart failure. Radial pulse assessment is more related to evaluating cardiac output and peripheral perfusion.
C. Monitor bowel movements: Monitoring bowel movements is not directly related to assessing fluid balance in heart failure. Although changes in bowel habits can sometimes be associated with fluid and electrolyte imbalances, it is not the primary method for assessing fluid balance in this context.
D. Monitor blood pressure daily: While monitoring blood pressure is important for managing hypertension and evaluating cardiovascular status, it is not specifically focused on assessing fluid balance in heart failure. Blood pressure monitoring is more related to assessing hemodynamic stability and response to medications.
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