S1S2 versus Systolic and Diastolic Murmurs! - USMLE Forums
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Old 04-17-2012
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Stethoscope S1S2 versus Systolic and Diastolic Murmurs!

I have been studying Cardiology from the Pass program. They described Cardiac Murmurs excellently, but one thing confuses me. They gave two sets of lists of murmurs: one was of S1 and S2 murmurs, and the other was of Systolic and Diastolic murmurs. How does one go about distinguishing between these two lists?
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Old 04-17-2012
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if the problem is in getting the blood out of the ventricles... it's a systolic problem [stenosis of the great vessels "aorta+pulmonary" or blood regurgitating back to the atria during contraction[emptying] of the ventricle], add to these a VSD, thats a systolic murmur also


if the problem is during getting blood in the ventricles or during filling them.. it's a diastolic [--> stenosis in the pathway between the atria and ventricle "mitral\tricuspid valves" or blood coming back [regurgitating] from the great vessels "aorta+pulmonary" after the ventricle pushed them out]
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I get that, but how does it correlate with the S1 and S2 classification system?
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Old 04-17-2012
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s1 and s2 arent classifications
they are heart sounds

diastolic and systolic is classification of murmurs.
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Old 04-17-2012
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Quote:
Originally Posted by Valkoff View Post
I get that, but how does it correlate with the S1 and S2 classification system?
Any murmur between S1 and S2 is systolic murmur. The Murmur after S2 is Diastolic.
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Old 04-18-2012
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I'm still a little confused- S1 murmurs are due to MR, TR, MS and TS. S2 are due to AR, AS, PR, PS. Systolic murmurs are due to MR and AS. It doesn't make much sense to me that there would be an overlap the causes of an abnormal S1 would cause bot a systolic AND a diastolic murmur.

I guess I'll call it a night. Hopefully, things will be a little clearer in the morning.
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Old 04-18-2012
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Originally Posted by Valkoff View Post
I'm still a little confused- S1 murmurs are due to MR, TR, MS and TS. S2 are due to AR, AS, PR, PS. Systolic murmurs are due to MR and AS. It doesn't make much sense to me that there would be an overlap the causes of an abnormal S1 would cause bot a systolic AND a diastolic murmur.

I guess I'll call it a night. Hopefully, things will be a little clearer in the morning.
Which valves r are open during systole? Aortic and Pulmonary. What will make the valves hard?! Calcification?! What will happen when the heart pumps against a narrow calcified valve? It will produce a sound while passing through the valve. So, Aortic and Pulmonary stenosis will lead to systolic murmurs.

Which valves are closed during systole? Mitral and Tricuspid. If they wont close properly, what will happen? Blood will flow backwards into the atria. So what do you think this is?! Regurgitation!

I think you can now apply the formula for the diastolic murmurs too! But if you will have trouble in that as well, let me know
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Old 04-18-2012
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Damn! It just clicked. Within the classification of systolic and diastolic murmurs, the volumes of S1 and S2 murmurs change.

Mitral and tricuspid pathologies would have an abnormal S1, and Aortic and pulmonary valve pathologies an abnormal S2.

This means that a Mitral regurg. would have a systolic murmur, a soft S1, and would have increased splitting of S2 on expiration. A tricuspid regurg will also have a soft S1 with increased S2 splitting on inspiration.

An aortic stenosis would be a systolic murmur with a loud S2.

The opposites are true for diastolic. Mitral Stenosis would have a loud S1, and aortic regurg a soft S2.
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Old 04-19-2012
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Quote:
Originally Posted by Valkoff View Post
Damn! It just clicked. Within the classification of systolic and diastolic murmurs, the volumes of S1 and S2 murmurs change.

Mitral and tricuspid pathologies would have an abnormal S1, and Aortic and pulmonary valve pathologies an abnormal S2.

This means that a Mitral regurg. would have a systolic murmur, a soft S1, and would have increased splitting of S2 on expiration. A tricuspid regurg will also have a soft S1 with increased S2 splitting on inspiration.

An aortic stenosis would be a systolic murmur with a loud S2.

The opposites are true for diastolic. Mitral Stenosis would have a loud S1, and aortic regurg a soft S2.
I have taken the real S***. Dont worry about these minor details!!
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Old 04-20-2012
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I have taken the real S***. Dont worry about these minor details!!
Lol. Thanks .
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