What is the rhythm name and the rate, according to the attached 6 second strip?
Supraventricular Tachycardia, 195 bpm.
Sinus Tachycardia, 150 bpm.
Ventricular Tachycardia, 210 bpm.
Atrial fibrillation with Rapid Ventricular Response, 210 bpm.
The Correct Answer is D
Choice A rationale
This rhythm originates above the ventricles, typically from the atrioventricular node or atria, characterized by narrow QRS complexes and a regular rhythm. In the provided strip, the absence of discernible P waves and a grossly irregular ventricular response contradicts this diagnosis. Additionally, the rate calculation based on a six second strip requires counting R waves and multiplying by ten, which leads to a specific frequency not matching this option's tachycardia profile.
Choice B rationale
This rhythm involves a regular discharge from the sinoatrial node exceeding 100 beats per minute, usually displaying identifiable P waves before every narrow QRS complex. Normal sinus rhythm features regular R-R intervals, whereas the strip demonstrates significant irregularity. Tachycardia at 150 bpm is common in stress or fever, but the chaotic nature of the atrial activity and the irregular ventricular rate on the monitor strip point toward a more disorganized supraventricular arrhythmia rather than sinus.
Choice C rationale
This life threatening rhythm is defined by a wide QRS complex (>0.12 seconds) originating from ventricular ectopic foci, typically presenting as a regular, rapid rhythm. The strip shows narrow QRS complexes, which indicates that the electrical impulse is traveling through the normal conduction system rather than originating in the ventricles. A rate of 210 bpm is possible, but the narrow morphology and irregular spacing definitively rule out a primary ventricular origin for this rhythm.
Choice D rationale
This condition is characterized by disorganized atrial electrical activity resulting in no distinct P waves and an irregularly irregular ventricular rhythm. Rapid ventricular response occurs when the atrioventricular node allows numerous impulses to pass, exceeding 100 bpm. By counting the R waves in a six second strip and multiplying by ten, a rate of 210 bpm is confirmed. The baseline shows fibrillatory waves, and the R-R intervals are inconsistent, making this the most accurate clinical diagnosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D","E"]
Explanation
Choice A rationale
Announcing interventions clearly allows the team leader and the recorder to track what has been administered in real time. This ensures that everyone is aware of the current state of the resuscitation and prevents the duplication of medication doses or procedures. In a high stress code environment, verbalizing actions helps maintain an organized and efficient workflow, which is essential for improving patient outcomes during an emergency situation like a cardiac arrest.
Choice B rationale
Repeating orders three times is unnecessary and can create excessive noise and confusion during a resuscitation event. Standard protocols for therapeutic and clear communication in a code blue involve repeating the order back once to confirm understanding, which is known as closed loop communication. Excessive repetition slows down the delivery of critical interventions and can interfere with the team leader's ability to give further instructions or hear important physiological monitor alarms.
Choice C rationale
Controlling the tone of voice is essential to maintain a calm and professional environment during a crisis. High pitched or frantic shouting can increase the stress levels of the team and lead to errors in judgment or execution. A controlled, firm, and calm tone ensures that instructions are heard and respected without causing panic. This psychological stability allows the team to focus on the technical aspects of Advanced Cardiovascular Life Support protocols.
Choice D rationale
Speaking clearly is a fundamental component of effective communication in any emergency setting. In a code blue, the room is often noisy due to equipment and multiple people working simultaneously. Mumbled or quiet instructions can lead to misunderstandings or delays in life saving care. Clear articulation ensures that every team member understands their specific role and the exact medications or tasks they are being asked to perform at that moment.
Choice E rationale
Closed loop communication involves the receiver repeating the order back to the sender to verify accuracy. Once the task is completed, the receiver then informs the sender that it has been done. This process minimizes the risk of medication errors and ensures that the team leader has an accurate mental model of the intervention timeline. It is a gold standard in crisis resource management to ensure safety and precision under high pressure situations.
Correct Answer is D
Explanation
Choice D rationale
Positive end expiratory pressure (PEEP) increases intrathoracic pressure to keep alveoli open and improve oxygenation. However, this increased pressure can compress the heart and great vessels, leading to decreased venous return and a subsequent drop in cardiac output. Monitoring arterial blood pressure is the most important safety assessment because excessive PEEP can cause significant hypotension. While oxygenation is the goal, the nurse must ensure the patient's hemodynamics are not compromised by the intervention.
Choice A rationale
Oxygen saturation is used to monitor the effectiveness of PEEP in improving gas exchange, as PEEP helps recruit collapsed alveoli. While improving saturation is a goal, it is not the most critical monitoring parameter for complications. A patient could have a rising oxygen saturation while their blood pressure is plummeting due to the mechanical effects of high intrathoracic pressure on the heart. Therefore, hemodynamic stability takes precedence when adjusting and monitoring PEEP levels in ventilated patients.
Choice B rationale
Tidal volume is the amount of air delivered with each breath. While PEEP affects the functional residual capacity, it is not the primary measure for its immediate systemic impact or effectiveness. The ventilator settings usually control the tidal volume directly in volume controlled modes. Monitoring tidal volume is important for lung protection and preventing barotrauma, but it does not provide immediate feedback on the systemic hemodynamic consequences of the positive pressure being applied to the chest.
Choice C rationale
Respiratory rate is typically set by the ventilator or influenced by the patient's underlying condition and sedation level. While PEEP might improve the ease of breathing by increasing lung compliance, the respiratory rate is not a specific or sensitive indicator of the effectiveness or the safety of PEEP. Changes in rate are more often related to pain, anxiety, or changes in metabolic demand rather than the direct physiological response to the recruitment of alveoli.
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