When using an ECG rhythm strip to quickly estimate the ventricular rate for a client, the nurse should:

count the number of large squares in the R-R interval and divide by 30C

print a 1-minute ECG strip and count the number of ORS complexes,

count the number of QRS complexes in 6 seconds and multiply by 10.

calculate the number of small squares between one QRS complex and the next one and divide by 1500.

Answer and Explanation

The Correct Answer is C

A.   Counting the number of large squares between R-R intervals and dividing by 30 is not the correct method for estimating the ventricular rate on an ECG strip.
B.   Printing a 1-minute ECG strip and counting the QRS complexes (option B) is accurate but unnecessary for a quick estimation.
C.   The most common and efficient method for estimating the ventricular rate quickly is to count the number of QRS complexes in a 6-second strip (often marked by two dashed lines) and multiply by 10. This gives an estimate of the heart rate per minute.
D.   Counting the number of small squares between QRS complexes and dividing by 1500 is the most accurate method but requires more time and precision than counting QRS complexes in 6 seconds.

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Free Nursing Study Resources

Correct Answer is B

Explanation

A. Sodium is crucial for maintaining normal cellular function, especially for nerve impulses and muscle contractions. However, sodium imbalances typically affect the general function of the heart, and sodium abnormalities are not commonly associated with torsades de pointes, which is a type of polymorphic ventricular tachycardia.
B. Magnesium plays a critical role in the electrical stability of the heart and helps regulate potassium and calcium channels, which are involved in the cardiac action potential. Hypomagnesemia (low magnesium) is a well-known risk factor for torsades de pointes, a specific type of polymorphic ventricular tachycardia that is associated with QT interval prolongation. In this case, the magnesium level is 2.5 mg/dL, which is above the normal range (1.6-2.2 mg/dL), suggesting hypermagnesemia.
C. Calcium is vital for proper muscle function, including the heart muscle, and is essential for electrical conduction. Hypocalcemia (low calcium) can lead to QT interval prolongation, which in turn increases the risk for arrhythmias such as torsades de pointes. However, in this case, the calcium level is 8.0 mg/dL, which is only slightly below the normal range (8.2-10.2 mg/dL), making calcium a less likely primary contributor to torsades de pointes in this situation.
D. Potassium plays a crucial role in regulating the resting membrane potential and action potentials in cardiac cells. Hypokalemia (low potassium) can lead to QT prolongation and increase the risk of arrhythmias, including torsades de pointes. However, in this case, the potassium level is 2.8 mEq/L, which is low (normal range: 3.5-5.3 mEq/L), and hypokalemia is more commonly associated with arrhythmias such as torsades de pointes than hyperkalemia (high potassium).

A. Assess the incision site for signs of infection B. Apply a sling to the operative arm C. Remove the pacemaker leads D. Monitor vital signs regularly E. Encourage vigorous physical activity

Correct Answer is ["A","B","D"]

Explanation

A. Assess the incision site for signs of infection - This is an essential nursing intervention after any surgical procedure, including pacemaker insertion, to prevent and detect early signs of infection.
B. Apply a sling to the operative arm - This helps to limit movement and prevent dislodging of the pacemaker leads, which is important for the healing process.
C. Remove the pacemaker leads - This is not an appropriate intervention. The pacemaker leads are left in place after insertion to ensure proper function of the pacemaker.
D. Monitor vital signs regularly - Regular monitoring of vital signs, especially heart rate and rhythm, is important to detect any complications such as arrhythmias after pacemaker insertion.
E. Encourage vigorous physical activity - Vigorous physical activity should be avoided initially to prevent any strain or potential damage to the pacemaker or leads. Early mobility is important, but it should be gradual and restricted.

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LAB	Result	Normal Range
Potassium	2.8 mEq/L	3.5-5.3mEq/L
Sodium	133 mEq/L	135-145 mEqL
Chloride	90 mEq/L	97-107 mEqL
Glucose	200 mg/dL	70mg/dL to 110mg/dL
Magnesium	2.5 mg/dL	1.6-2.2 mg/dL

LAB	Result	Normal Range
Potassium	2.8 mEq/L	3.5-5.3mEq/L
Sodium	133 mEq/L	135-145 mEqL
Chloride	90 mEq/L	97-107 mEqL
Glucose	200 mg/dL	70mg/dL to 110mg/dL
Magnesium	2.5 mg/dL	1.6-2.2 mg/dL
Calcium	8.0 mg/dL	8.2-10.2 mg/dL:

When using an ECG rhythm strip to quickly estimate the ventricular rate for a client, the nurse should:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Labs

Correct Answer is B

Explanation

Correct Answer is ["A","B","D"]

Explanation

Company

Resources

When using an ECG rhythm strip to quickly estimate the ventricular rate for a client, the nurse should:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Labs

Correct Answer is B

Explanation

Which intervention(s) should the nurse include in the post-operative care of a client following a permanent pacemaker insertion? (SELECT ALL THAT APPLY)

Correct Answer is ["A","B","D"]

Explanation

When using an ECG rhythm strip to quickly estimate the ventricular rate for a client, the nurse should:

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