What is it when the heart is unable to pump a sufficient blood supply, resulting in inadequate perfusion and oxygenation to the tissues?
Angina.
Heart failure.
Dysrhythmia.
Myocardial infarction.
The Correct Answer is B
Choice A rationale
Angina is a clinical syndrome characterized by chest pain or pressure resulting from myocardial ischemia. It occurs when the oxygen demand of the heart muscle exceeds the supply provided by the coronary arteries, often due to atherosclerosis. While it involves a localized supply-demand mismatch in the heart itself, it does not define the systemic state where the heart fails as a pump to maintain adequate circulation and oxygenation to all the peripheral tissues of the body.
Choice B rationale
Heart failure is the correct term for the physiological state in which the heart is unable to pump blood at a rate sufficient to meet the metabolic requirements of the tissues. This results in inadequate systemic perfusion and tissue oxygenation. It can be caused by structural or functional abnormalities that impair the ability of the ventricles to fill with or eject blood. This leads to symptoms such as fatigue, dyspnea, and fluid retention throughout the body systems.
Choice C rationale
A dysrhythmia refers to any abnormality in the rate, regularity, or sequence of cardiac depolarization and repolarization. While some dysrhythmias, such as ventricular fibrillation or severe bradycardia, can lead to decreased cardiac output and poor perfusion, the term itself only describes the electrical activity of the heart. It is not synonymous with the overall pumping failure of the heart, as many dysrhythmias do not immediately result in systemic tissue hypoxia or global perfusion deficits.
Choice D rationale
Myocardial infarction occurs when blood flow to a specific part of the heart muscle is blocked, leading to the death of cardiac myocytes. While a large myocardial infarction can certainly cause heart failure by damaging the pumping mechanism, the infarction itself is an acute ischemic event. Heart failure is the broader clinical condition and resulting syndrome of inadequate systemic perfusion that may or may not be triggered by a specific event like an acute myocardial infarction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Respiratory alkalosis is characterized by a blood pH greater than 7.45 and a PaCO2 less than 35 mm Hg. This occurs when hyperventilation causes excessive elimination of carbon dioxide. The findings in this scenario, such as a pH less than 7.35 and a PaCO2 greater than 45 mm Hg, are the exact opposite of what is seen in alkalosis, indicating that the primary problem is an accumulation of acid rather than a deficit.
Choice B rationale
Respiratory acidosis occurs when the lungs cannot effectively remove the carbon dioxide produced by the body, leading to an increase in PaCO2 greater than 45 mm Hg and a decrease in pH less than 7.35. In pulmonary edema, fluid in the alveoli impairs gas exchange. This retention of CO2 leads to the formation of carbonic acid, resulting in the symptoms of headache, dizziness, mental cloudiness, and muscle twitching as seen here.
Choice C rationale
Metabolic acidosis involves a primary decrease in bicarbonate (HCO3) less than 22 mEq/L and a pH less than 7.35. While the pH in this scenario is low, the PaCO2 is elevated, which points toward a respiratory cause. In metabolic acidosis, the respiratory system usually attempts to compensate by increasing the rate and depth of breathing to blow off CO2, which would result in a low PaCO2, not an elevated one.
Choice D rationale
Metabolic alkalosis is defined by a pH greater than 7.45 and an HCO3 greater than 26 mEq/L. It can be caused by the loss of gastric acid through vomiting or the gain of bicarbonate. The client's findings of a low pH and high PaCO2 are inconsistent with an alkalotic state. In metabolic alkalosis, the body may attempt to compensate by hypoventilating to retain CO2, but the underlying pH would remain high.
Correct Answer is D
Explanation
Choice A rationale
Performance criteria describe the measurable qualities or the level of performance expected from the client, such as the distance walked or the accuracy of a task. In the stated goal, the phrase with 2-person assist already serves as a performance criterion or modifier by defining how the transfer must occur. Therefore, the performance criteria are technically present in the goal, and this is not the missing element.
Choice B rationale
Client behavior represents the specific action the client is expected to perform, which must be observable and measurable. In this clinical goal, the behavior is identified as the act of transferring from the bed to the chair. Since the action of transferring is clearly stated, the behavior component is already included in the nursing outcome statement and does not need to be added by the nurse.
Choice C rationale
Conditions or modifiers define the specific circumstances under which the behavior is to be performed, such as using equipment or receiving help. The phrase with 2-person assist acts as the condition for the transfer. Because these modifiers are already incorporated into the written goal, adding more conditions is not the primary requirement for completing this specific outcome according to standard nursing process guidelines.
Choice D rationale
A target time is a critical component of a SMART goal, indicating when the outcome is expected to be achieved. The current goal lacks a deadline, such as by discharge or within forty-eight hours. Without a specific timeframe, the nurse cannot effectively evaluate whether the client is progressing at an appropriate rate. Adding a target time ensures the goal is measurable and time-bound for evaluation.
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