Which of the following describe a non-ST segment elevation myocardial infarction (NSTEMI)?
A complete occlusion of the coronary artery
Chest pain upon exertion that resolves with rest
A partial occlusion of the coronary artery
Chest pain while at rest
The Correct Answer is C
A. A complete occlusion of the coronary artery is characteristic of an ST-segment elevation myocardial infarction (STEMI), not an NSTEMI.
B. Chest pain that resolves with rest is more indicative of stable angina rather than NSTEMI.
C. An NSTEMI occurs due to a partial occlusion of a coronary artery, leading to myocardial ischemia and damage without ST-segment elevation on an ECG.
D. Chest pain at rest can be seen in both unstable angina and NSTEMI, but it is not the defining feature of NSTEMI.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Atherosclerosis is correct. It is the primary cause of myocardial infarction (MI) due to the narrowing and eventual blockage of coronary arteries by plaque buildup, leading to reduced oxygen supply to the heart muscle.
B. Obesity is a risk factor for MI but is not the direct cause. It contributes to conditions like hypertension, diabetes, and atherosclerosis, which increase MI risk.
C. Hypertension increases the risk of MI by damaging blood vessels over time, but it is not the most common direct cause.
D. Diabetes Mellitus type 2 is a risk factor because it contributes to vascular damage and atherosclerosis, but it is not the primary cause of an MI.
Correct Answer is A
Explanation
A. Delivering a continuous flow of air pressure to keep the airway open is correct. CPAP (Continuous Positive Airway Pressure) prevents airway collapse during sleep, allowing for uninterrupted breathing and oxygenation.
B. Reducing daytime sleepiness is a benefit of CPAP use, but it is not its primary purpose—it is a secondary effect of improved oxygenation and sleep continuity.
C. Improving sleep quality also occurs with CPAP therapy, but this is an outcome rather than the primary purpose.
D. Promoting weight loss is not the function of CPAP therapy, though weight loss can help reduce OSA severity.
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