What’s a Lub Dub? Heart Sounds Explained!

In this quick heart sound breakdown, learn how S1 and S2 (that classic “lub-dub”) relate to mitral and aortic valve closure—and what that tells you about heart health.

Perfect for nurses, med students, EMTs, and anyone reviewing for ACLS or cardiac assessments.

🎧 Hear the difference. Boost your cardiac confidence.
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Видео What’s a Lub Dub? Heart Sounds Explained! канала ACLS Certification Association