NBME 20 Coarctation of the aorta (NBME Answers)

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Retired NBME 20 Answers

nbme20/Block 1/Question#20 (reveal difficulty score)
An 8-year-old boy is evaluated for ...
Coarctation of the aorta 🔍 / 📺 / 🌳 / 📖
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+19 upvote downvote
submitted by ∗hayayah(1212)

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Coarctation of the aorta leads to increased LV overload causing LV hypertrophy and a L axis deviation.

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hungrybox Similarly, RV overload leads to R axis deviation. Could point to PAH. +2

athenathefirst Why not pulmonary valve stenosis? +1

stresssweat pulmonary valve stenosis would be R heart overload +

+11 upvote downvote
submitted by ∗hungrybox(1277)

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Mitral valve stenosis only causes LA overload. In contrast to ventricular overload, atrial overload does not cause any axis deviations.

Thus, mitral valve stenosis is incorrect.

(I was between this and mitral valve stenosis.)

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+1 upvote downvote
submitted by andremosq(9)

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CAUSES OF LEFT AXIS DEVIATION:

Left ventricular hypertrophy, Left BBB, Inferior MI,WPW syndrome (accessory pathway in the left side), Left anterior block..

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