After reviewing an electrocardiogram, the nurse determines that an electrical impulse originated in a patient's sinoatrial (SA) node with a P wave. What does this represent?
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
The Correct Answer is A
A. The P wave on an ECG represents atrial depolarization, which occurs as the electrical impulse originates in the sinoatrial (SA) node and spreads through the atria, initiating atrial contraction.
B. Atrial repolarization typically occurs during the QRS complex and is not represented by the P wave. Atrial repolarization is masked by the larger QRS complex.
C. Ventricular depolarization is represented by the QRS complex on an ECG, as the electrical impulse spreads through the ventricles, leading to ventricular contraction.
D. Ventricular repolarization typically occurs during the T wave and is not represented by the P wave. Ventricular repolarization involves the recovery of ventricular muscle cells after contraction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Sanguineous drainage is typically bright red and composed mainly of red blood cells. It is common immediately after surgery but does not typically indicate infection.
B. Purulent drainage is thick, yellow, or greenish in color and contains pus, indicating infection. It requires prompt assessment and intervention.
C. Serous drainage is clear, watery, and pale yellow in color. It is typically a normal finding in surgical wounds.
D. Serosanguineous drainage is pink to pale red and contains a mixture of blood and serum. It is common in the early stages of wound healing.
Correct Answer is C
Explanation
A. These values are within the normal range and not indicative of chronic kidney disease.
B. While an elevated BUN is present, the serum creatinine level is within the normal range, which is not consistent with chronic kidney disease.
C. Both BUN and serum creatinine levels are elevated, indicating impaired kidney function and consistent with chronic kidney disease.
D. These values are within the normal range and not indicative of chronic kidney disease.
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.
