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NBME Step 2 CK Form 8 Answers

step2ck_form8/Block 2/Question#38 (reveal difficulty score)
A 3-day-old newborn is brought to the ...
Closure of the ductus arteriosus ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
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 +5 
submitted by โˆ—step_prep(147)
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  • Thsi si a sliaccs posirettenna rfo a ptintae hitw actnricoato of eth a.ator nWhe yeth ear itsrf ,orbn doolb si blae to get spat eth cniraoctoat aeuebcs bodol fwlo uohghtr teh cdtusu risorsaeut enrest eth otara itlasd to teh oac.atotrnci ehWn het cdtusu eiraurtsso ssolec in het tifsr ekwe fo ei,fl eht elft deis of the herat ehnt eses a vsmieas rneceasi in fod,arleat eaindlg to rahet aireufl

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azibird  Is the patent foramen ovale required for this? Apparently it stays open for 6 months to a year. Because otherwise I can't understand how the PDA distal to the coarctation would be helpful. So does PFO then PDA help divert LA blood into the descending aorta? According to UTD: "During the neonatal period, when the PDA and foramen ovale (between the right and left atria) begin to close, the cardiac output that must cross the narrowed aortic segment to reach the lower extremities steadily increases." +
jj375  @azibird sometimes the PDA is proximal to the coarctation! https://assets.aboutkidshealth.ca/AKHAssets/Hearts_CHD/Coarctation.jpg?RenditionID=19 +



 +2 
submitted by โˆ—spiroskeet(31)
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shTi wsa a oloyrp rwddeo esiuntqo โ€“ eht rdgeliunny mecshniam of het h'sicdl iodntnoic si nnirgrawo fo hte ra,tao guanics bckapu iont hte rhaet nda prupe bydo. fI yhet danwte ot get at ywh ti esdnprtee fatre 3 yads nseaidt fo idmml,eyaite bmaye sujt mbeya htye vlhsd'oeu edkas taht easdtn.i

notyasupreme  Agreed! This is worded so badly, and is so classic NBME! I guess it couldn't have been the others because increase in peripheral vascular resistance isn't technically counted as the aorta. +



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