Review the lab results in the chart tab

LAB

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:

A client admitted to the Emergency Department (ED) and the cardiac monitor shows multifocal premature ventricular contractions (PVC's). Initial laboratory findings are as follows. The nurse recognizes that the client's PVC's are most likely caused by:

hypermagnesemia.

hypocalcemia.

hypokalemia,

hyperglycemia

Answer and Explanation

The Correct Answer is C

A.   Hypermagnesemia can cause bradycardia and hypotension, but it is less commonly associated with PVCs. This does not align with the lab results provided.
B.   Hypocalcemia can cause arrhythmias, but it is not the most likely cause of PVCs in this case, considering other findings.
C.   Hypokalemia (low potassium) is a known cause of PVCs. The patient's potassium level is 2.8 mEq/L, which is significantly low and most likely contributing to the PVCs.
D.   Although hyperglycemia can affect cardiac function, it is less commonly linked to PVCs compared to electrolyte imbalances, such as hypokalemia.

Nursing Test Bank

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Correct Answer is B

Explanation

A. A low hemoglobin level indicates anemia, not heart failure. While anemia can exacerbate heart failure, it is not the primary indicator.
B. BNP is a biomarker that is elevated in response to heart failure. A level above 100 pg/mL is suggestive of heart failure, and 410 pg/mL indicates significant heart stress and likely acute heart failure.
C. A low sodium level (hyponatremia) can occur in heart failure, but it is not specific enough to confirm the diagnosis. BNP is a more direct indicator of heart failure.
D. This is a normal fibrinogen level and does not indicate heart failure. Fibrinogen is more associated with clotting disorders.

A. hypermagnesemia. B. hypocalcemia. C. hypokalemia, D. hyperglycemia

Correct Answer is C

Explanation

A. Hypermagnesemia can cause bradycardia and hypotension, but it is less commonly associated with PVCs. This does not align with the lab results provided.
B. Hypocalcemia can cause arrhythmias, but it is not the most likely cause of PVCs in this case, considering other findings.
C. Hypokalemia (low potassium) is a known cause of PVCs. The patient's potassium level is 2.8 mEq/L, which is significantly low and most likely contributing to the PVCs.
D. Although hyperglycemia can affect cardiac function, it is less commonly linked to PVCs compared to electrolyte imbalances, such as hypokalemia.

View Question and Answer

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			Male: 14- 17.3 g/dL
Hematocrit	26%	24%	Female: 36%-48% Male: 42%-52%
Platelets	35,000mm3	20,000mm3	150,000- 450,000mm3
RBC	4.5 mm3	3mm3	Female: 4.01-5.51 million/mm3 Male: 4.51-

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:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is caring for a client diagnosed with acute heart failure on the telemetry unit. Which laboratory result does the nurse know is most indicative of this diagnosis?

Correct Answer is B

Explanation

Correct Answer is C

Explanation

The nurse would assess the client diagnosed with disseminated intravascular coagulation (DIC) for which manifestation of the disorder?

The nurse is caring for a client who has had a temporary transvenous pacemaker inserted. The cardiac monitor shows pacemaker spikes occurring at various points in the client's own beats such as on the T wave. What action is the nurse's priority?

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

The nurse is planning care for a client diagnosed with heart failure who will soon be discharged home. What should be included in the teaching plan? The client will:

The nurse is reviewing the laboratory values for the client diagnosed with heart failure and notes the sodium level is 128 mEq/L (normal 135-145mEq/L). How should the nurse interpret this finding?

A nurse is assessing a client who has fluid overload. Which of the following findings should the nurse expect? (Select all that apply.)

The nurse is evaluating the following rhythm strip on a client in the telemetry unit. The client is alert and oriented but complains of slight nausea after eating breakfast. What is the nurse's best action?