Your-Doctor Multiple Choice Questions (MCQ)

Quiz Categories Click to expand

Category: Cardiology--->Aorta And Hypertension
Page: 2

Question 6#Print Question

According to Laplace’s law, a doubling of the radius results in:

a. Four times the circumferential wall stress
b. Eight times the circumferential wall stress
c. Twice the circumferential wall stress
d. Half the circumferential wall stress
e. Makes no difference to the circumferential wall stress as long as the pressure reduces by 20 mmHg


Question 7#Print Question

A 33-year-old man is seen in the cardiology outpatient clinic. He is being followed up for aortic regurgitation.

Which one of the following is true?

a. If he has Marfan syndrome and his aortic root measures 46 mm, he should be referred for aortic valve and root replacement
b. If he has a bicuspid aortic valve and his aortic root measures 5 mm, he should be referred for aortic valve and root replacement
c. If he has neither Marfan syndrome nor a bicuspid valve but his aortic root measures 57 mm, he should be referred for aortic valve and root replacement
d. If he has neither Marfan syndrome nor a bicuspid aortic valve but his aortic root measures 47 mm and he has moderate AR with an end-diastolic dimension of 64 mm, he should be referred for an aortic valve and root replacement
e. Answers A, B, and C correct


Question 8#Print Question

You see a 60-year-old musician in the outpatient clinic who discharged himself 2 weeks previously following admission with a confirmed type B dissection of the aorta. He tells you that he doesn’t want to take any medication as he prefers natural healing methods. His blood pressure is 180/90 mmHg. He asks you what the future holds for him off medication.

What can you tell him that the data suggest if he has no treatment?

a. Approximately 1/6 (16%) are dead within a year and 1/5 (20%) die within 5 years
b. Approximately 1/20 (5%) are dead within a year and 1/10 (10%) die within 5 years
c. Approximately a third (33%) are dead within a year and half (50%) die within 5 years
d. The type of tear in his aorta is not as serious as other types of tear and the herbal remedy Echinacea has been used successfully for this condition for hundreds of years in the Amazon delta
e. None of the above are true


Question 9#Print Question

Which one of the following statements regarding the choice of imaging in a patient with suspected acute type A aortic dissection is true?

a. A transthoracic echocardiogram is the first investigation of choice because of its availability and accuracy/ease of use/ability to assess the aorta and left ventricular function
b. A plain chest radiograph with non-mediastinal widening is a typical finding in 50% of patients with aortic dissection
c. A disadvantage of TOE is that part of the ascending aorta is obscured by the trachea
d. Absence of ECG gating prevents accurate diagnosis of type A dissection in 35% of patients
e. The presence of a Medtronic Surescan DDDR device is a good reason not to opt for MRI of the aorta


Question 10#Print Question

Which one of the following is true regarding CT of the aorta?

a. Helical CT scanners of four detector rows currently offer the optimal possible data acquisition for state of the art reconstruction of the aorta
b. ECG gating reduces motion artefact which is particularly useful when imaging the descending aorta
c. If appropriately acquired, a CT of the aorta and a CT coronary angiogram can be performed in a single acquisition
d. New-generation multidetector helical CT scanners show sensitivities up to 95% and specificities of 94%
e. In aortic dissection the scan should continue to the coeliac axis




Category: Cardiology--->Aorta And Hypertension
Page: 2 of 6