Heart Sounds and Heart Murmurs, Animation.

(USMLE topics, cardiology) Basic hearts sounds and common heart murmurs.
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Voice by: Sue Stern.
All images/videos by Alila Medical Media are for information purposes ONLY and are NOT intended to replace professional medical advice, diagnosis or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.
When a healthy heart beats, it makes a “lub-dub” sound. The first heart sound “lub”, also known as S1, is caused by the closing of the AV valves after the atria have pumped blood into the ventricles. The second heart sound “dub”, or S2, originates from the closing of the aortic and pulmonary valves, right after the ventricles have ejected the blood. The time interval between S1 and S2 is when the ventricles contract, called SYSTOLE. The interval between S2 and the NEXT S1 is when the ventricles relax and are filled with blood, called DIASTOLE. Diastole is longer than systole, hence the lub-dub, lub-dub, lub-dub…
Heart sounds are auscultated at 4 different sites on the chest wall which correspond to the location of blood flow as it passes through the aortic, pulmonic, tricuspid, and mitral valves, respectively. This is how SIMILAR defects associated with DIFFERENT valves are differentiated.
Heart murmurs are whooshing sounds produced by turbulent flow of blood. Murmurs are diagnosed based on the TIME they occur in the cardiac cycle, their changes in INTENSITY over time, and the auscultation SITE where they are best heard.
Examples of conditions associated with common systolic murmurs include:
- MITRAL valve regurgitation, when the mitral valve does NOT CLOSE properly and blood surges back to the left atrium during systole. The murmur starts at S1, when the AV valves close, and maintains the same intensity for the entire duration of systole. This holosystolic murmur is best heard at the mitral region -the apex, with radiation to the left axilla. Because the valve closure in mitral regurgitation is INcomplete, S1 is often quieter. On the other side of the heart, a TRICUSPID valve regurgitation has similar timing and shape, but it is loudest in the tricuspid area and the sound radiates up, along the left sternal border.
- AORTIC valve stenosis, when the aortic valve does NOT OPEN properly and blood is forced through a narrow opening. The blood flow starts small, rises to a maximum in mid-systole at the peak of ventricular contraction, then attenuates toward the end of systole. This results in a crescendo-decrescendo, or a diamond-shaped, murmur which starts a short moment after S1. It is often preceded by an ejection click caused by the opening of the STENOTIC valve. Aortic stenosis murmur is loudest in the aortic area and the sound radiates to the carotid arteries in the neck following the direction of blood flow. Again, on the other side of the heart, a PULMONIC stenosis has the same characteristics but is best heard in the pulmonic area and does NOT radiate to the neck.
Other conditions that cause audible systolic murmurs include ventricular septal defect and mitral valve prolapse.
An example of diastolic murmurs is aortic valve regurgitation. This is when the aortic valve does NOT CLOSE properly, resulting in blood flowing back to the left ventricle during diastole- the filling phase. As the blood flows in the REVERSE direction, the murmur is best heard NOT in the aortic area, but rather along the left sternal border. It peaks at the beginning of diastole when the pressure difference is highest, then rapidly decreases as the equilibrium is reached.
Other common diastolic murmurs are associated with pulmonic regurgitation, mitral stenosis and tricuspid stenosis.

[@Alilamedicalmedia]

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[@katsgonz]

I had open heart surgery last Aug 2020 to repair my mitral valve (I had severe mitral regurgitation). Prior to the surgery, my murmur was so loud I can hear it whenever I lay down in bed, "SHHH DBSSH" 😂 After surgery, it was exhilarating to hear the normal LUB DUB heartbeat sound again! I consider it a creative miracle. Medical science is amazing.

[@-ANDY.]

Did it come and go in the beginning or permanent since the start?

[@senkaletemitope1915]

Glad you're OK now

[@limitless12070]

i am becoming a cardiac surgeon 😊

[@limitless12070]

do you have tissue valve or mechanical valve?

[@katsgonz]

@@limitless12070 hello, I had a mitral valve repair ☺️

[@nanwijanarko1969]

I'm a geology student, what am I doing here. But it really is interesting how our body works. To all med students out there, hang in there! You are cool. Do your best. Good luck.

[@warpzone8421]

Man. I'm just an indie game developer, and somehow I wound up here. Face it. Us nerds are just gonna go where we go on our wiki-walks. Geology students rock! :P

[@caribaez5711]

Nan Wijanarko 🤓🌷

[@jerad248]

Awe thank you dear!

[@nebulakula5410]

i’m just a dumb gay kid and same

[@bloodtypena]

I am a fashion design gradute wtf am i doing here?

[@Laurissaaaa]

Normal heart 0:06, Mitral valve regurgitation 1:44, Aortic Stenosis 2:43, Aortic regurgitation 3:45.

[@jaibeatoff879]

Thanks

[@skrozneobican]

thanks beautiful girl!

[@rajendrakumarsahoo9338]

Laurissa Brown thanks

[@bingbong1821]

Laurissa Brown no shit genius

[@lokeshyadav120]

Laurissa Brown okk

[@nithyasreesathyanarayanan5611]

As a med student, I understood this more easily than the lectures I attended. Wonderful, keep it up! ❤️

[@Alilamedicalmedia]

Glad it was helpful!

[@dikshasonone3516]

Really

[@marymcintyre1702]

I was born with a hole in my heart and still have a murmur. I often have low blood pressure or abnormal readings as the nurses always put the squeeze band multiple times and double and triple check my numbers. My doctor ordered blood tests but said they were normal. I don’t know what to do I am afraid the hole in my heart never closed properly. No doctors are accepting new patients in Canada besides medicentres where you get a different random doctor (normally a student) each time you go

[@bgmnodak]

Explained Heart sounds and murmurs better in 4 minutes than hours of lecture and studying did. This would have been REALLY appreciated 30 yrs ago. Reminded me of meeting Dr. Harvey In his 90's at a seminar where he described murmurs and made the sounds with his own voice. Beat boxer Master Cardiologist!

[@JohnDoe-qt4nz]

Absolutely spot on, accurate and concise. Just shows the beauty of life, the delicate and complex balance everything must be in to work properly. Fascinating how the sounds indicate the area of concern, and how we can still enjoy life's journey. Perhaps we'll appreciate our family, friends and value the time we have been granted.

[@nothingbettertodo7398]

As a person with a heart murmur this shit scared the hell out of me

[@macyaboizzz942]

Dude my dad side is filled with heart disease and I thought I heard I murmur and I’m freaking out. That’s why I’m here right now

[@denver_5392]

Same

[@theavengers1001]

@@macyaboizzz942 get medical help...most valvular diseases can be surgically treated

[@Bigmarc1104]

🤣🤣🤣🤣🤣🤣🤣yoo I'm smacked

[@kenyattafrazier]

Just found out today that I have a murmur. Shit is eating me up. I don’t want a surgery like that

[@kaineugwu7521]

This is one of the best videos explaining heart sounds I’ve ever heard

[@pregabalems]

As a doctor, perfect star for this brilliant presentation

[@kaiaabbott6443]

Lemuel Sinogba I have a heart murmur I was born with it and I still have it

[@emmarandom9609]

@@kaiaabbott6443 ask your Dr what's causing it

[@michaelescay1260]

fantastically put together. Very easy to understand by including the definition, the waveform, and the anatomy on one slide. thank you

[@colorcodedcrayons]

Very helpful video! Love that you have a lot of visuals to depict what’s happening in each murmur.

[@Deyd121]

Professors tried to teach us heart murmurs without audio tracks... Loved your video! Finally I got them!

[@damnbro_idc]

You know how ASMR is relaxing, well, this video here is Anti-ASMR. It fills me with anxiety

[@AiiRv]

😂😂 fr, I’m panicking.

[@seeker296]

aortic regurgitation is like nails on a chalkboard to me :puke:

[@cassaundracasey1030]

lol 😂

[@kilgoretrout4491]

no it is not nerd

[@rachelchannels]

Sometimes, I love medicine but I’m lawyer lol 😂 love ASMR too

[@suguriannah8192]

normal beat lib-dub0:06 ausculation area 0:45 mitral regulgitation 1:45 aortic stenosis 2:42 aortic regulgitation 3:45

[@lesliebirdsong9994]

Loved that you spelled regurgitation incorrectly

[@Lost-mb1gj]

Leslie Birdsong 🙄

[@dannypark6771]

[@mindhoover]

I felt ashamed when she said "thank you for watching" at the end. That's me who should thank you for providing me with this wonderful video. You're blessed.

[@longassride8054]

Never found a better explanation than this. This is short and precise. Exactly what i needed

[@pirate0bloodyskull]

So much information packed into one 4 minute video. Well done!

[@teok117]

I just received my aortic valve replacement recently only and I was so worried since the doctors didn't tell me about its sound after surgery. Thank you so much. Its sound scary if you hear first time but there is nothing to worry.

[@cmorichie7202]

When it stops beating, you won't have to worry cause you'd be dead

[@ayvi2742]

Wow I really needed this video :) i am a veterinary student and i listening to my very old dog’s heart (16,5 years) and he has a perfect mitral regurgitation.

[@DaddysPinkBunny]

I'm a nursing student and I came here for audio of murmurs. for anyone wondering= 1:05

[@antimage1182]

Lol I'm a nurse and I'm here for the same reason

[@adaeze4873]

SuperEmm here for the same reason THANK YOU

[@14shreyamahatara28]

I m also nursing std

[@yellownoise991]

NP student here

[@gabybiz6089]

@@antimage1182 Hi I had a question . I understand you cannot give any diagnosis but would you know what would be a possible cause for the heart to race even when sitting down and feel like it suddenly slows down and cause you to cough?

[@pleasedont8544]

This made me very anxious for some reason.

[@jimbor8774]

You don't normally hear heart sounds, let alone the abnormal ones. Hearing them heart sounds is a reminder of how well this dynamic organ works to keep you alive but also how fragile it is to the forces of life. I didn't like hearing when I started meditating but I got real familiar with it after awhile and actually find it comforting knowing I'm not really alone on this earth, I've always got my body, specifically my heart to remind me.

[@warpzone8421]

@@jimbor8774 Also every horror movie ever uses heart sounds as people are panicking, dying, being possessed, or hiding from the monster.

[@autumnspring6624]

Please Don't Listening to the heart does that to me too. Isn't the heart amazing?

[@TreyPDB]

same

[@wild23oo]

Watch me and tell me what is it

[@brendansemon5698]

This might be the best A&P channel on KZbin

[@swaggbunny1502]

We had a dog. A Newfoundland I named Chloe. She was such a pleasant and easy puppy to take care of, not a hassle like other puppies. It seemed to good to be true. Not only did she take frequent naps, but she also showed no interest in the pools we set up for her (newfies are supposed to love the water). We soon discovered she had a heart murmur. She was such a gentle puppy because she was tired, and she didn't have much time. We had to let her go. And when we did, all I could think about were the times when I saw her sleep. Her paws would twitch. In her dreams she can have all the energy in the world to run as much as she wanted. It was when she was sleeping that she was the happiest.

[@christophergrillo410]

This video is extremely helpful for clearing up my confusion on where to listen and why. Thanks for making this!!!

[@TheNursesStation]

hello i am a nursing student and i found this video very helpful and easy to understand.. thank you and continue to do videos like this

[@TheNursesStation]

@Ana YourBestie 😊😊😊😊

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@Ana YourBestie where from you?

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@Ana YourBestie Indian occupied Jammu and Kashmir

[@sharonhamilton6107]

We're or are you trained like this? I was

[@jhanavisabharwal7452]

I was studying body fluids and circulation for class 11 . Neet 2022..helped a lot...ps:all the best to all future docs and nurses👍👍

[@leilamatindoost8565]

A perfect video to hear heart sounds and murmurs. Thanks.

[@thefluffybunny8545]

I was curious what heart murmurs sound like and which one could be mine (because I have a heart problem), but I didn't hear mine. The closest sounding one was when you were introducing heart murmurs. Thanks for educating me!

[@pendulumvalorant4033]

How are u now

[@meii2387]

Mine sounds like 2:43

[@joycedmulbah306]

Hope you are doing great today!

[@ranjanpal929]

10/10 for this video....m a nrsng student came here for listening heart sounds...👍👍

[@dilshodruzmetov3536]

That is a very short and clear definition of heart sounds and murmurs. thanks

[@Edward-ko4rh]

Thank you so much for this video, it took me ages to understand this. This channel helped me loads in physiology.

[@ummefarwazaidi3192]

Your videos are very helpful.Keep up the good work.

[@ijeomainobeme9612]

Thanks for the explicit video. Very precise

[@mihret-abmehari6765]

Your videos have always been helpful!!

[@DEEKSHI2020]

Make the same video with EKG changes during each of the condition you've mentioned. Loved it, thankyou

[@agglyusr]

This is wonderful. Thank you so much!!!

[@farrahfarrah8352]

Clear and informative! Thank you

[@deekshithakishore2637]

Clear and understandable voice,thank alot for sharing ur knowledge

[@amaderabdullah1544]

Thanks a lot. Most concise video on murmur I have ever seen!

[@viveksinghchauhan7496]

Thankyou for making such content. It was a bit confusing, so I was looking for a video where they would explain sounds along with the animation of blood flow. Now this mechanism is clear to me. Thankyou!

[@alisiaalyas6665]

Beautiful animation. Thank u very much. Continue posting such videos

[@ijeomainobeme9612]

This is quite educating and very explicit.Thanks

[@Nabilo8501]

The best channel on youtube ever ever ever ever ever

[@judec.1962]

Amazing the heart sound!

[@muazhilmi2734]

the visualised sound really helps thank you so much great tutorial

[@Auriam]

Really well explained. Thanks!

[@ayushimittalmail]

This is one of the best videos on youtube

[@vanguardangel6912]

Training to be a medical scribe! One hell of a transition from my graphic design degree to a medical field so doing extra research. Thank you very much for uploading this!

[@nataliesimon852]

thank you. great visuals

[@Yerfdog1]

This is amazing!! THank you so much!!

[@maqboolahmad2746]

Thank you. I have seen many videos on this topic, but this video explained it the best and in short time. Appreciated.

[@biellosjofa]

thank you doctor alila!

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In my graduation I would like to thank Alila channel as well as osmosis... I don’t know how would my life be without them

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Thank YOU! You made us feel very happy that we could help that much!

[@mxiong7440]

I love this so much, thank you

[@kojjoevalyne2888]

thank you so much for describing how to determine the normal and abnormal heart beat.

[@staneciawynter8250]

Wow, this is was so short and helpful. Thank you.

[@annemariew5923]

Sehr gute Vorstellung...vielen Dank dafür

[@Gigloria14]

Thanks for the excellent video!

[@SmartSam1]

So beautifully explained. Thank you. 👌😊

[@hizbakhan6425]

Very well explained. Thanks ☺️

[@qazialimohayuddin6526]

BEautiful absolutely nailed it

[@zeduehdoerue3163]

Thank you for this educative but brief video.

[@tsejing8462]

Thank you! Makes me easier to understand This helps a lot!

[@gibreelkhamis855]

very nice

[@hannahhannah3331]

Thank you! Very helpful video ❤️

[@saadmaqsood6842]

Wonderful and concise explanation along with real sound . kindly make video on Breathing sounds and added sounds during lung pathology. Regards Dr saad

[@MuazAkbik]

Very nice !

[@thelegendgamer33]

What an excellent video, thankyou very much.

[@DrJJ-co9wy]

Very useful video...got cleared my all concepts👍

[@MohammedZaza0]

Thank you for this explanation!🤍

[@SikanderkhanPTI]

I dont comment regularly, i dont how to say thanks to the owner, this is amazing visual learning for medical students and doctors.

[@jalpapatel7876]

Thank you so much for the video!

[@Alllpowerfulll]

Nice lecture! Thank you so much :)

[@abishaiabyssinians8791]

That was helpful, thank you!

[@jafinalias]

Thank you so much for the video...

[@shabanahameed5254]

Mashallah. Thank you mam. Your videos are very informative and helping me in studies.

[@noahkirumira5128]

Thanx for the lecture!!....... Can you please also teach about Coronary blood vessels and their branches.

[@MK-rf6ng]

damn, you saved my life:) Can't really understand what my lecturer said. But Immediately understand it after watching your videos:)

[@User1234_hvanelove]

I finally understood this..thank you sooo much

[@PrinceVerma-ho7qx]

Informative post. Congratulations

[@anandchaudhari5631]

Thank you!! God bless you

[@dr.prernamonga1005]

Thank u for the wonderful explanation!

[@catherinewalker5290]

Great video!!! helped me a lot...thank you

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Tnx and best video ! Make me understand easier

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Very good information

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Thank you.

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Amazing.😊. That's indeed an informative short vedio..Being a bio student..I'm thankful to u.. For such a precised explanation di✨🤗

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Thank you so much

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I should probably come by and watch this video every day.

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Very helpful, thanks.

[@Vision33528]

I like it very much...more useful ..never understand this much .thanks a lot madam

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Brilliant presentation

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Great video for education, thank you for sharing

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Clinically it's very helpful. Thank a lot

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Nice Presentation, thanks

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this one's pretty good!

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Awesome video!👍

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This is a best video ever very easy to understand.

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fascinating - thank you

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Amazing ..very helpful video ❤ We need videos for all systems