Download MBBS Systolic Murmur Lecture PPT

SYSTOLIC MURMURS

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Murmurs which occurs during any part or
whole of systole.
It may be
? Ejection systolic murmurs
? Pansystolic murmurs

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? Late systolic murmurs

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Ejection systolic murmurs
It occurs in mid systole.
Causes:
? Increased flow through normal valves
?Severe anemia,fever,athletes,pregnancy

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?Atrial septal defect [pulmonary flow
murmur]

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Normal or reduced flow through stenotic
valve
?Aortic stenosis
?Pulmonary stenosis
? Subvalvular obstruction

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?Hypertrophic obstructive cardiomyopathy

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Pansystolic murmurs
Pansystolic murmurs maintain a constant

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intensity
Extend from the first heart sound
throughout systole to the second heart
sound
They occur when blood leaks from a

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ventricule to a low pressure chamber at
an even or constant velocity.

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Causes:
?Mitral regurgitation
?Tricuspid regurgitation
?Ventricular septal defect

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Late systolic murmurs
Unusual
Causes:
?Mitral valve prolapse

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?If mitral regurgitation confined to late
systole
?If dynamic obstruction occurs in late
systole

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