Which statement is true regarding Premature Ventricular Contractions (PVCs)?
Are caused by the SA node malfunctioning.
Treatment is only if the patient is symptomatic ORS remains narrow on EKG/ECG.
Two or more PVCs is considered Ventricular Tachycardia.
PVCs are harmless and do not require treatment.
The Correct Answer is B
Choice A rationale:
Incorrect. PVCs are not caused by a malfunctioning SA node. The SA node is responsible for initiating the normal heartbeat, while PVCs originate from the ventricles. The underlying cause of PVCs can vary, but it's not directly related to SA node dysfunction. Choice C rationale:
Incorrect. Ventricular tachycardia (VT) is a rapid heart rhythm originating from the ventricles, typically defined as three or more consecutive PVCs. Two PVCs in a row are usually classified as a couplet, not VT.
Choice D rationale:
Incorrect. While PVCs are often harmless, they can sometimes be associated with underlying heart disease or lead to complications, especially if they are frequent or occur in specific patterns. Therefore, careful assessment and potential treatment are necessary.
Choice B rationale:
Correct. Treatment for PVCs is generally only recommended if the patient experiences concerning symptoms or if the PVCs are associated with a risk of developing more serious arrhythmias. Additionally, the QRS complex on the EKG/ECG should be evaluated. A narrow QRS complex during PVCs typically suggests a less concerning origin within the ventricles, while a wide QRS complex may indicate a higher risk of complications.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
While educating the patient about the pathophysiology of acute coronary artery disease (ACAD) is important, it is not the priority intervention during an acute episode.
The patient is likely experiencing significant discomfort and anxiety, and their ability to process information may be impaired.
Providing immediate relief of symptoms and stabilizing the patient's condition take precedence over education at this time.
Choice B rationale:
Supplemental oxygen may be beneficial for patients with ACAD, but it is not the highest priority intervention.
Oxygen therapy can improve oxygen saturation levels in the blood, but it does not directly address the underlying issue of coronary artery occlusion.
It is important to administer nitroglycerin first to dilate the coronary arteries and improve blood flow to the heart muscle.
Choice C rationale:
Sublingual nitroglycerin is a vasodilator that relaxes and widens blood vessels, improving blood flow to the heart muscle.
It is a first-line medication for the treatment of acute angina (chest pain) and is often used in the setting of ACAD.
Nitroglycerin can rapidly relieve chest pain and other symptoms of ischemia, such as shortness of breath, and can help prevent further damage to the heart muscle.
Choice D rationale:
Staying with the patient to decrease anxiety is important, but it is not the priority intervention.
While providing emotional support can help to calm the patient and reduce stress, it does not directly address the underlying issue of myocardial ischemia.
It is crucial to administer nitroglycerin to dilate the coronary arteries and improve blood flow to the heart muscle.
Correct Answer is C
Explanation
Answer and explanation
The correct answer is C. Normal Sinus Rhythm.
Choice A rationale:
Asystole is the absence of all electrical activity in the heart, as evidenced by a flat line on the electrocardiogram (ECG). It is a medical emergency that requires immediate cardiopulmonary resuscitation (CPR) and defibrillation.
Key features of asystole on ECG:
No discernible P waves, QRS complexes, or T waves.
A completely flat or nearly flat line on the ECG tracing.
Choice B rationale:
Atrial flutter is a rapid heart rhythm that arises from abnormal electrical activity in the atria. It is characterized by a sawtooth pattern on the ECG, with atrial rates typically between 250 and 350 beats per minute.
Key features of atrial flutter on ECG:
Absence of distinct P waves, instead replaced by flutter waves (sawtooth pattern).
Regular, rapid atrial rate (typically 250-350 bpm).
QRS complexes may be normal or slightly irregular in appearance.
Choice C rationale:
Normal sinus rhythm is the natural, healthy rhythm of the heart. It originates in the sinoatrial (SA) node, the heart's natural pacemaker, and is characterized by a regular rate of 60-100 beats per minute, with consistent P waves, QRS complexes, and T waves on the ECG.
Key features of normal sinus rhythm on ECG:
Presence of distinct P waves, QRS complexes, and T waves.
Regular rhythm with a rate of 60-100 beats per minute.
PR interval (the time between the P wave and QRS complex) is 0.12-0.20 seconds.
QRS duration (the time it takes for the ventricles to depolarize) is less than 0.12 seconds.
Choice D rationale:
Sinus bradycardia is a slow heart rhythm, with a rate below 60 beats per minute. It is often a normal finding in healthy individuals, especially athletes or during sleep. However, it can also be a sign of underlying medical conditions.
Key features of sinus bradycardia on ECG:
Presence of distinct P waves, QRS complexes, and T waves.
Regular rhythm with a rate less than 60 beats per minute.
PR interval and QRS duration are typically normal.
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