A client with a history of angina is being admitted to the emergency department with a suspected myocardial infarction (MI). Which of the following findings will help the nurse distinguish stable angina from an MI?
MI only occurs with exertion.
Stable angina can occur for longer than 30 minutes.
Stable angina can be relieved with rest and nitroglycerin.
The pain of an MI lasts less than 15 minutes.
The Correct Answer is C
Choice A reason: Myocardial infarction (MI) is not limited to occurrences with exertion. While stable angina typically occurs during physical activity or emotional stress, MI can happen at any time, even at rest. The underlying cause of an MI is the complete blockage of blood supply to a part of the heart muscle, usually due to a blood clot in a coronary artery. This blockage can lead to the death of heart muscle tissue, a condition that requires immediate medical attention.
Choice B reason: Stable angina does not typically last for more than 30 minutes. It is characterized by chest pain or discomfort that occurs predictably with exertion or emotional stress and is relieved within minutes by rest or nitroglycerin. In contrast, the pain from an MI is more prolonged and severe, and it is not relieved by rest or nitroglycerin. If chest discomfort lasts longer than 15 minutes and is not alleviated by rest or nitroglycerin, it is a warning sign that the individual may be experiencing an MI.
Choice C reason: This is the distinguishing feature between stable angina and an MI. Stable angina is usually relieved within 3-5 minutes by rest or nitroglycerin, which helps to dilate the coronary arteries and improve blood flow to the heart muscle. Nitroglycerin is ineffective in relieving the symptoms of an MI because the problem is not just reduced blood flow but a complete blockage that nitroglycerin cannot overcome.
Choice D reason: The pain associated with an MI typically lasts for more than 15 minutes and can be quite severe. Unlike stable angina, the pain of an MI is not relieved by rest or nitroglycerin. The duration and severity of the pain, along with other symptoms such as shortness of breath, sweating, nausea, or lightheadedness, help differentiate an MI from stable angina.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["60"]
Explanation
- Step 1: Identify the required dose in grams. The client is scheduled to receive 30 grams of lactulose.
- Step 2: Identify the concentration of the available solution. The available solution contains 5 grams of lactulose per 10 mL.
- Step 3: Calculate the volume of solution needed to deliver the required dose. We can set up a proportion to solve for this:
- 5 grams is to 10 mL as 30 grams is to X mL.
- In other words, 5 g : 10 mL = 30 g : X mL.
- Step 4: Solve for X using cross-multiplication and division:
- Cross-multiplication gives us: 5 g × X mL = 30 g × 10 mL.
- Simplifying this gives us: 5X = 300.
- Dividing both sides by 5 gives us: X = 300 ÷ 5.
- Calculating the division gives us: X = 60.
60 mL of the lactulose solution should be poured into the medication cup to administer the required dose of 30 grams.
Correct Answer is D
Explanation
Choice A reason: A BUN level of 20 mg/dL is within the normal range (7-20 mg/dL) and does not indicate an increased risk of AKI.
Choice B reason: Serum Osmolality of 290 mOsm/kg H2O is within the normal range (275-295 mOsm/kg H2O) and does not suggest an increased risk of AKI.
Choice C reason: A Magnesium level of 2.0 mEq/L is within the normal range (1.7-2.2 mEq/L) and does not indicate an increased risk of AKI.
Choice D reason: An elevated serum creatinine level, such as 1.8 mg/dL, indicates decreased kidney function and is a risk factor for AKI, especially post-MI where the kidneys may be vulnerable due to reduced cardiac output and potential nephrotoxic interventions.
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