Persistent Left Superior Vena Cava (Left SVC) | Embryology and Clinical Anatomy

This video explains the embryology and clinical anatomy of persistent left superior vena cava.
Animation and drawings by:
/ karthik_easvur
Disclaimer: Medical Snippet does not provide a diagnosis or other recommendation for treatment and is not a substitute for the professional judgment of a healthcare professional in the diagnosis and treatment of any person or animal. The determination of the need for medical services and the types of healthcare to be provided to a patient are decisions that should be made only by a physician or other licensed health care provider. Always seek the advice of a physician or other qualified healthcare provider with any questions you have regarding a medical condition.
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ECHO video courtesy:
Otero D, Stoddard M, Ikram S. Dilated Coronary Sinus: An Indicator of Persistent Left Superior Vena Cava. Asp Biomed Clin Case Rep. 2020 May 12;3(2):116-17.
asploro.com/dilated-coronary-...
DOI: 10.36502/2020/ASJBCCR.6197

[@kelizabeth3061]

i was diagnosed with an isolated left svc as an infant and going to cardiologists every year gave me a life long love of anatomy :)! love the video super informative but not so full of jargon it’s hard to follow

[@soundescape5413]

Great video! Finally went to see an Adult Congenital Cardiologist for my coarctation. They did a very thorough echo. Just read this incidental finding on the echo. That seems to be the Double SVC w/ PLSVC without the bridging vein causing coronary sinus dilation. This video cleared up a lot of confusion and concern, thank you!

[@MedicalSnippet]

thank you and you're welcome 😊

[@srisatya1754]

Excellent explanation sir .thanks

[@MedicalSnippet]

thank you

[@mariyoabinet]

Simple and easy explanation . Thanks👍

[@MedicalSnippet]

you're welcome

[@dimahjar]

Very helpful ..Thank you !

[@MedicalSnippet]

you're welcome 🙏

[@taryke]

Excellent overview. Thank you

[@MedicalSnippet]

you're welcome 🙏

[@sanfazsanfaz5696]

Thanks alot

[@MedicalSnippet]

you're welcome 🙏

[@paediatricspotcases5220]

Great video Make sir coronary sinus anomaly video

[@MedicalSnippet]

thank you

[@deepadodamani1116]

My anomaly report shows absent right superior vena cava and persistent left superior vena cava can you please tell me the risks

[@kelizabeth3061]

there are typically no risks if the baby does not have any other heart conditions and the only issue is the isolated svc. only thing to ever think about is if they ever need a heart surgery (like a pacemaker as an adult) they might have to take a different approach to get it in the right spot :)

[@meri1085]

Could u please explain whats bridging vein? in the context of bilateral svc,!

[@MedicalSnippet]

The bridging vein is nothing but left brachiocephalic vein

[@meri1085]

@@MedicalSnippet so its like, bridigin vein /LBCV may or may not be present in bilateral svcs !!?

[@MedicalSnippet]

yes... around 30% of cases only it is present

[@MukeshSharma-np5tm]

PLZ HELP: My wife is into her 23rd week of pregnancy, she has DCDA twin pregnancy. The recent anomaly scan showed that one foetus has PLSVC (absent RSVC) PLSVC draining into coronary sinus. Narrowing at LVOT origin. Likely compressing on ascending aorta. Aortic valve - alising of blood flow in ductus arteriosus. Suggestions: Watch for Coarctation of aorta & Postnatal Echocardiography. QUESTION: Please tell me very clearly if there is a risk associated with this baby? What is the chance of this defect harming the baby in future?

[@MedicalSnippet]

I can understand your concern... but I would suggest consulting a pediatric cardiologist or cardiac surgeon in person with the complete fetal echo report for a proper counseling

[@MukeshSharma-np5tm]

@@MedicalSnippet Np, thank you for the reply.

[@7thwik]

Hi Mukesh, our baby also has been diagnosed with PLSVC, what happened on your end. Is it safe ? Can you please reply

[@MukeshSharma-np5tm]

@@7thwik my babies are absolutely healthy. They are currently 8 months old. Ensure that you facilitate a NICU or consult a pediatric cardiologist before the time of delivery. You may require shifting the baby to NICU for safety purpose, as it happened in my case. Later I got both babies checked with a reputed pediatrician, who noticed nothing wrong with their hearts. You may visit a pediatric cardiologist once your baby turns 3 months old to get an echo for understanding the nature of LSVC.

[@nisha361]

Agr left and right dono trf superior vena cava ho to koi problem hoti h?

[@MedicalSnippet]

it's not a problem as such, but while doing cardiac surgery, we have to change some steps if left SVC is present.

[@sudiptapal2025]

My wife is 5+ months pregant and PLSVC found during Anomaly scan. Except PLSVC, all the other things are fine in this scan. We also have NT Scan and Double Marker test reports which were done earlier, those were fine as well. Could you pls confirm if the presence of this PLSVC is harmful for our child?

[@coolnature7787]

We need this answer for above issue ...plz reply us

[@nisha361]

Sudipta, apka baby thik hai? Mere baby me bhi yhi problem btai

[@sudiptapal2025]

They had Fetal Echocardiography and the echo result was fine. So doctor told not to worry as PLSVC doesn't create problems as such.

[@nisha361]

@@sudiptapal2025 ok mujhe bhi dr. Bole after delivery eco kra lena. Apka baby ka birth ho gya ya abhi nhi?

[@nisha361]

And mujhe amniotic test k liye bola vo normal h reports