The nurse is reading a cardiac monitor of a patient and observes a regular rhythm, and the P waves have a sawtooth pattern. The nurse recognizes this as which arrhythmia?
Atrial flutter
Ventricular tachycardia
Atrial fibrillation
Sinus tachycardia
The Correct Answer is A
A. Atrial flutter is characterized by a regular rhythm with rapid atrial contractions (flutter waves) that have a sawtooth appearance on the ECG tracing.
B. Ventricular tachycardia typically presents with a wide QRS complex and is often associated with hemodynamic instability.
C. Atrial fibrillation is characterized by irregularly irregular rhythm with no distinct P waves and irregular ventricular response.
D. Sinus tachycardia is characterized by a regular rhythm with a heart rate greater than 100 beats per minute originating from the sinus node.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","D","E"]
Explanation
A. Digoxin typically decreases the heart rate by increasing vagal tone and reducing conduction through the atrioventricular node.
B. Digoxin may have minimal effects on blood pressure, primarily by improving cardiac output in patients with heart failure, but its primary action is on cardiac contractility and rhythm.
C. Digoxin has a negative chronotropic effect, meaning it slows the heart rate by increasing parasympathetic tone and decreasing conduction through the atrioventricular node.
D. Digoxin has a positive inotropic effect, meaning it increases the force of cardiac contractions, which can be beneficial in patients with heart failure.
E. Digoxin can suppress ectopic beats (abnormal heart rhythms originating outside the sinoatrial node) by slowing conduction through the atrioventricular node and enhancing vagal tone
Correct Answer is B
Explanation
A. Showering is not typically restricted after a splenectomy. Good hygiene practices, including regular showering, are important for preventing infection.
B. Patients who have undergone a splenectomy are at increased risk of infections, particularly from encapsulated bacteria such as Streptococcus pneumoniae. Yearly flu vaccination helps reduce the risk of influenza-related complications.
C. Long-term antibiotic prophylaxis is not routinely recommended for all patients after splenectomy. Antibiotics may be prescribed in certain situations, such as for postsplenectomy sepsis prevention, but lifelong use is not standard practice.
D. Sleeping position is not directly related to infection prevention after splenectomy.
General infection prevention measures, such as vaccination and avoiding exposure to sick individuals, are more important.
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