S1 S2 — Lub Dub

"LUB" = valves close, blood goes out "DUB" = valves snap, blood fills back in When to worry: Muffled sounds, extra sounds (S3, S4), or irregular rhythms always warrant a closer look. Hashtags: #Cardiology #NursingSchool #HeartSounds #MedEd #Auscultation #LubDub

💓 S1, S2, Lub, Dub: The Foundation of Heart Auscultation s1 s2 lub dub

Let's break it down: