S3 vs S4 Heart Sound

The S3 and S4 heart sounds are both low pitch heart sounds heard in diastole. They differ when they are heard in diastole, S3 being heard early in diastole while S4 is heard later in diastole.

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[chloev]

s1 + s2 + S3 + S4 all together is kinda a jam

[rawdonwaller]

This is the simplest and clearest vid I've come across. Obviously haven't seen every vid there is available, but this sets the standard IMO. Well done

[ashwinkola]

Thank you so much! The part in the end that highlights the corresponding heart sound was extremely helpful!

[Bang]

im a visual learner and the graphic paired with the sound helped me a lot in differentiating a seemingly the same sound. thank you so much.

[okobacollins]

You guys just solved my problems in a beat. How can I like this multiple times❣

[nush]

This is the most helpful video I've ever seen in my life. THANK YOU!

[eric]

This is probably one of the best Videos on YouTube for listening to the S1, S2, S3, S4 sounds. It really helped me to see the graphic that went with the sounds. 1:06

[doctorshocker]

you're a life saver, lucky to have found this channel !!!

[davicaldasdossantos]

This playlist is very good! Thanks for making it available on youtube.

[kaitlynhill]

great video! really helpful when the parts lit up at the end

[smilestormb.]

Awesome Mehn!!!. Never really appreciated these sounds. Now it’s makes so much sense. Esp the S3 and S4 distinction

[wasanakodithuwakku]

Thank you so much! These videos are amazingly made!

[jessedahringer]

Such a great video with the visuals, thank you so much!

[prateekmisra]

S3:
- Thought to be caused by the oscillation of blood back and forth between the walls of the ventricles initiated by the inflow of blood from the atria.
- May be normal in people under 40 years of age and some trained athletes but should disappear before middle age. Re-emergence of this sound late in life is abnormal and may indicate serious problems like heart failure.

S4:
- While the mechanism is not absolutely certain, it is generally accepted that S4 is caused by stiffening of the walls of the ventricles (usually the left), which produces abnormally turbulent flow as the atria contract to force blood into the ventricle.
- S4 is sometimes audible in the elderly due to a more rigid ventricle. When loud, it is a sign of a pathological state, usually a failing left ventricle.

[BRAVE_AGAINST_MYSELF]

Omg, god this is awesome ❤❤❤❤
God bless you guys.

[olaebrhem]

Wow this is the best explanation thank you a lot.