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 A
Explanation
Choice A reason: A distended bladder is a common cause of autonomic dysreflexia. It can trigger an exaggerated response from the autonomic nervous system, leading to a rapid increase in blood pressure. This is because the full bladder sends signals to the spinal cord, which then attempts to send signals to the brain. However, due to the injury, these signals cannot pass through, resulting in a reflex that increases blood pressure.
Choice B reason: While a severe headache is a symptom of autonomic dysreflexia, it is not a cause. The headache results from the body's response to a triggering stimulus, such as a distended bladder, which leads to the high blood pressure characteristic of autonomic dysreflexia.
Choice C reason: Nasal congestion is not typically a cause of autonomic dysreflexia. The condition is usually triggered by a noxious stimulus below the level of the spinal cord injury, such as a full bladder or bowel, skin irritation, or other types of physical discomfort.
Choice D reason: Elevated blood pressure is a symptom, not a cause, of autonomic dysreflexia. The condition itself causes a sudden spike in blood pressure due to an uncontrolled reflex sympathetic discharge in response to a triggering stimulus below the level of the injury.
Correct Answer is D
Explanation
Choice A reason: Tenderness in the left upper abdomen is not typically associated with an obstruction of the common bile duct. This symptom is more commonly related to conditions affecting the stomach, pancreas, or spleen. The common bile duct is in the right upper quadrant of the abdomen, and tenderness in this area might be expected with its obstruction.
Choice B reason: Ecchymosis of the extremities is not a common finding in common bile duct obstruction. Ecchymosis, or bruising, is usually due to trauma, blood disorders, or other causes of fragile blood vessels and is not related to bile duct issues.
Choice C reason: Pale-colored urine is the opposite of what might be expected with common bile duct obstruction. Typically, the urine may become dark due to increased bilirubin levels that are excreted by the kidneys when the bile duct is obstructed.
Choice D reason: Fatty stools, or steatorrhea, are a classic finding in common bile duct obstruction. When bile flow is blocked, fats are not properly digested and absorbed, leading to stools that are bulky, greasy, and often have a foul odor. This occurs because bile is necessary for the emulsification and absorption of dietary fats in the intestine.
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