Repeated USMLE Questions Step 1- Review- 25

Q- Which one of the following is the most common etiology of abdominal aortic aneurysm in the United States?

A- Atherosclerosis

B- Cystic medial necrosis

C- Rheumatic heart disease

D- Turner syndrome

A- Atherosclerosis- Other choices are not as common as atherosclerosis though they can lead to the development of aortic aneurysms. They are not as common as atherosclerosis especially in elderly population.


Q- Amiodarone is considered one of which of the following classes of anti-arrhythmic drugs?

A- Class I

B- Class II

C- Class III

D- Class IV

C- Class III- Amiodarone is one of the potassium-channel blockers. Class I are sodium-channel blockers, Class II are beta blockers while Class IV are calcium-channel blockers.


Q- Which one of the following conditions is a long term complication of cystic fibrosis?

A- Adenocarcinoma of the lung

B- Bronchiectasis

C- Emphysema

D- Pneumothorax 

B- Bronchiectasis- Cystic fibrosis is characterized by inflammatory obstruction and dilation of the bronchi throughout the lungs which eventually leads to bronchiectasis.


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2 thoughts on “Repeated USMLE Questions Step 1- Review- 25”

  1. Thank you Dr Ahsan. I hope it helps students and doctors in their medical journey. God Bless you too.

  2. Very nice and very helpful
    God bless you

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