The nurse obtains a monitor strip on a patient who has had a myocardial infarction and makes the following analysis: P wave not apparent, ventricular rate 196, R-R interval regular, P-R interval not measurable, QRS complex wide and distorted, QRS duration 0.18 second. The nurse interprets the patient's cardiac rhythm as;
ventricular tachycardia.
atrial fibrillation.
atrial tachycardia.
ventricular fibrillation.
The Correct Answer is A
The characteristics described in the monitor strip analysis suggest ventricular tachycardia. The absence of a visible P wave and the wide and distorted QRS complex indicates that the electrical impulse is originating in the ventricles rather than the atria. The ventricular rate of 196 and regular R-R intervals further support the diagnosis of ventricular tachycardia.
B. Atrial fibrillation in (option B) is incorrect because it is characterized by irregularly irregular R-R intervals and the absence of discernible P waves. The QRS complex is typically narrow
C. Atrial tachycardia in (option C) is incorrect because it would have a rapid atrial rate with regular R-R intervals, and P waves may or may not be discernible. The QRS complex is typically narrow.
D. Ventricular fibrillation in (option D) is incorrect because it would present as a chaotic, rapid, and irregular electrical activity with no discernible P waves, QRS complexes, or regular R-R intervals. It is a life-threatening emergency that requires immediate defibrillation.
Therefore, based on the provided information, the nurse would interpret the patient's cardiac rhythm as ventricular tachycardia. However, it is important to note that an accurate interpretation should be made by a qualified healthcare professional, and the patient's clinical context should also be considered.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Mean arterial pressure (MAP) is a measure of the average pressure within the arteries during one cardiac cycle. It represents the perfusion pressure that drives blood flow to organs and tissues. In the context of shock, a MAP of 50 mm Hg is considered low and indicates inadequate tissue perfusion.
To improve tissue perfusion and restore blood pressure, the nurse would anticipate administering large volumes of intravenous fluids, such as Lactated Ringers (LR). Fluid resuscitation aims to increase intravascular volume and improve cardiac output, ultimately leading to improved tissue perfusion.
B. Cardiac Output (CO) is 4 L/min in (option A) is incorrect because Cardiac output represents the volume of blood pumped by the heart per minute. While a low cardiac output may require intervention, it does not specifically indicate the need for large volumes of fluid administration.
C. Stroke volume is 70 ml/beat in (option C) is incorrect because Stroke volume refers to the volume of blood ejected by the heart with each contraction. While stroke volume can be an important determinant of cardiac output, it alone does not indicate the need for large fluid volumes.
D. The heart rate is 80 bpm in (option D) is incorrect because: Heart rate is the number of heartbeats per minute. While the heart rate can impact cardiac output, it does not provide direct information about fluid resuscitation needs.
Correct Answer is C
Explanation
In the initial 24 hours after burn injury, fluid resuscitation is a critical priority in the management of burn patients. Burn injuries can lead to significant fluid loss, both locally at the burn site and systemically due to increased capillary permeability. Fluid resuscitation aims to restore and maintain adequate intravascular volume, ensuring sufficient tissue perfusion and organ function.
The Parkland Formula is commonly used to guide fluid resuscitation in burn patients. It involves calculating the total volume of fluid needed in the first 24 hours, with a portion given in the initial hours after injury and the remainder given over the remaining hours.
A. Sterile dressing changes (option A) are incorrect because they are important in wound care management for burn patients to prevent infection. However, fluid resuscitation takes precedence within the first 24 hours.
B. Emotional support (option B) is incorrect because it is an essential aspect of burn care, as burn injuries can have a significant psychological impact. While emotional support is crucial for the patient's overall well-being, it may not be the highest priority within the first 24 hours compared to addressing the physiological needs of fluid resuscitation.
D. Range-of-motion exercises (option D) are incorrect because they are important for preventing contractures and maintaining joint mobility in burn patients. However, they are typically initiated after the initial fluid resuscitation phase and wound stabilization.
Therefore, the priority the nurse anticipates within the first 24 hours for a 31-year-old male patient with burn injuries is fluid resuscitation.
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