This video explains it https://www.youtube.com/watch?v=kvQ2IU3ILRo&list=PL3n8cHP87ijDnqI8_5WQlS4tN37D6P4dH&index=8&t=52s
I think by 'left sternal border' they're referring to the Erb's point - left 3rd ICS on sternal border.
Even I got it wrnong thinking tricuspid area is being described!
Graet oeidv no 1S dan t'is i!l!pts
eTh ywa I emrmereb i,t 1:S iratMl ma;&p dstpiircu cb bdloo eosg orfm iaatr ot trenlseciv neht mrof tsevenircl to iousdet the ahert g;-t-& 2S. wN,o henw yuo ehva a lpSit S1 eth ayw I itkhn oautb is that whne uyo lehani ouy vaeh rexta dloob coigmn otin hte rgthi seid fo teh rhtae os het usidcrtpi vsalve lecsos ralet dna suscea a iptls 1S ounp noistiea.prr poeH tath lshep.
:Q ipSlt 1S hreda rveo etLf tnrelas rbodre - ritcudspi rea.a Fsrit ptemncono of S?:A1 htgyinan C(M in BBB)R atth ussace yeddlea cueosrl of ctsprduii veval rcdoepma to lamrit -avlve wlli uasec lpist 1S tihw ddleeay 1T dan yrale 1M hrdea ta Tcdrusipi eara.
leaePs aedr teh ltsa snnectee of hte enti. qosu I htnki het tpsil gitmh be ucsaebe fo b.b,R sthi uscsea eht ltiarm dna riusdtcpi evval to elocs ta ieneftdfr mtsei.
os- chihw fo hte iloofglnw sbet slpiaxne the isftr coepmnotn fo teh hrtae odsun (tislp 1)S. S dlhou eb the mliatr aevvl cruseol feober teh tiipurcsd .lavve
submitted by โlfsuarez(160)
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$279$49irsFt rathe dunos S1() is teenregda yb tow arthe se:alvv het ritaml vvael dan ctdisruip lv.ave alryeN ouaslsetumin igclsno of hetes alvves amllyrno stngreeea a egsnli S1 ns.oud ttSilnipg fo eth 1S dosun is dreha nhwe larmit nad icrdustip evslav seocl at sythlgli rdntiffee tim,se hwti uusllay eth raltim icnosgl erbeof rspidictu
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