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!
Gatre diveo on 1S and 'tsi listp!!
The awy I mbeeerrm i,t S:1 ralMti ;&apm ucdrpsiti bc olodb seog ofmr traai to intecrevsl htne rmfo lisctevner to souetid teh rehta g;t&-- .S2 Nwo, hwne yuo aveh a ptilS S1 teh wya I hnikt bouat is htta hnew ouy ahnlie ouy have erxta boldo mnogic otin the higrt dsie fo teh aethr so eht iditurpsc asvvel oscsel letar nda asesuc a islpt 1S upno iopratre.isn peoH ttha e.splh
:Q tpSil 1S earhd voer fetL aelrsnt bredor - tcrpsdiui .area Fistr mnocpoten fo AS?:1 gynthnai (CM in BBB)R thta asecsu deedlay clruseo fo psuicdtir eavvl corepadm to tiamlr evvl-a lliw uacse plsit 1S wiht eadldey T1 dna reyla M1 redha at rcpiidTus arae.
eaPles erad hte salt tncesnee fo eth t.oqenis u I tnhki eth tlsip gthim eb cuseabe fo ,.bRb hsti eusacs teh rtimal adn rpiuticds vavel to ceslo at trdfneief et.sim
so- icwhh fo the ilfowgnlo steb anselxip hte ifstr potmocnen of hte rteha nudso lt(spi 1S.) lu dSoh be teh lmarit alevv olcresu freebo teh suicdrtpi .evavl
submitted by โlfsuarez(160)
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$279$49 65% OFFrtiFs thera nusdo 1)S( is artegedne yb wot hreat evav:sl het laimrt vlvae nad sdcpuriti vl.vea eralNy leaiunstosum ngcslio of etseh vavlse laloymrn ngeeaetrs a silgne S1 o.nsud tgSltniip of hte S1 sonud is ardeh hewn lrmiat nda irucidtps svvlae ceols at gitlshyl fifenetdr t,meis iwth alylsuu het aritlm sigclno foereb psiduitcr
$279$49 65% OFF