The nurse is evaluating a patient who is experiencing chest pain beneath the sternum.
Which symptom reports would support a diagnosis of stable angina pectoris over a potential myocardial infarction?
(Select All That Apply)
The pain lasts less than five minutes.
I have experienced shortness of breath with the pain.
The pain started while I was watching television.
One nitroglycerine tablet alleviated the pain.
Correct Answer : A,C,D
Choice A rationale:
Duration of pain: Stable angina typically lasts for less than 5 minutes, while pain from a myocardial infarction (MI) typically lasts longer, often 20 minutes or more. This is because stable angina is caused by a temporary decrease in blood flow to the heart muscle, while an MI is caused by a complete blockage of blood flow, leading to more severe and prolonged pain.
Mechanism of pain: The pain in stable angina is due to ischemia, which is a lack of oxygen to the heart muscle. This occurs when the demand for oxygen by the heart muscle exceeds the supply of oxygenated blood.
Nitrates and ischemia: Nitrates, such as nitroglycerin, work by dilating the coronary arteries, which increases blood flow to the heart muscle and relieves ischemia. This is why nitroglycerin is often effective in relieving the pain of stable angina.
Choice B rationale:
Non-specific symptom: Shortness of breath can occur with both stable angina and MI, as well as other conditions such as lung disease or anxiety. Therefore, it is not a specific symptom that can be used to differentiate between the two conditions.
Choice C rationale:
Activity level: Stable angina is typically triggered by exertion or emotional stress, which increase the heart's demand for oxygen.
Rest and angina: The pain often subsides with rest or nitroglycerin.
MI and rest: In contrast, the pain of an MI can occur at rest and is not always relieved by nitroglycerin.
Choice D rationale:
Nitrates and stable angina: As mentioned earlier, nitrates are often effective in relieving the pain of stable angina.
Nitrates and MI: However, they may not be as effective in relieving the pain of an MI, as the blockage of blood flow is more severe.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Digoxin is a medication that slows the heart rate. It would be contraindicated in this patient because they are already bradycardic.
Administering digoxin could further slow the heart rate and worsen the patient's symptoms.
Additionally, digoxin can have a negative inotropic effect, which could further compromise the patient's hemodynamic status. Choice B rationale:
While it is important to continue to monitor the patient, this is not an intervention that will address the patient's bradycardia and hypotension.
The patient is already symptomatic, and their heart rate and blood pressure are likely to continue to decline without intervention. Choice C rationale:
Defibrillation is used to treat life-threatening arrhythmias such as ventricular fibrillation and pulseless ventricular tachycardia.
It is not indicated for sinus bradycardia.
Choice D rationale:
Transcutaneous pacing is a non-invasive method of pacing the heart.
It can be used to temporarily increase the heart rate in patients with symptomatic bradycardia.
This is the most appropriate intervention for this patient because it will address the underlying problem of bradycardia and improve the patient's hemodynamic status.
Correct Answer is B
Explanation
Choice B rationale:
LDL (low-density lipoprotein) cholesterol is often referred to as "bad" cholesterol. It contributes to the buildup of plaque in the arteries, which narrows the arteries and can lead to coronary artery disease (CAD). CAD is a major risk factor for heart attack and stroke.
HDL (high-density lipoprotein) cholesterol is often referred to as "good" cholesterol. It helps to remove LDL cholesterol from the arteries and transport it back to the liver, where it can be broken down and removed from the body. Therefore, a high HDL level is protective against heart disease.
An elevated LDL level and a lowered HDL level are both associated with an increased risk of CAD. This is because the elevated LDL level contributes to plaque buildup, while the lowered HDL level means that there is less "good" cholesterol available to remove the "bad" cholesterol from the arteries.
Therefore, the statement "Increased LDL and decreased HDL increase my risk of coronary artery disease" indicates an understanding of the significance of these cholesterol levels.
Choice A rationale:
This statement is incorrect. An increased LDL level will actually increase the amount of cholesterol deposited on the artery walls.
Choice C rationale:
This statement is also incorrect. A decreased HDL level will decrease the amount of cholesterol moved away from the artery walls.
Choice D rationale:
This statement is incorrect. Increased LDL has the potential to increase, not decrease, the risk of heart disease.
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