Download MBBS Diastolic Murmurs Lecture PPT

DIASTOLIC MURMURS
? Murmurs which occur during any part of
diastole are known as diastolic murmurs.
? Due to accelerated or turbulent flow across
the mitral or tricuspid valves.

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? Low pitched noises that are often difficult to
hear& should be evaluated with bell of
stethescope.

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EARLY DIASTOLIC MURMUR

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? Confined to early diastole which begins with
S2

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? Causes- aortic & pulmonary regurgitation
features
AR

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PR
site
Right 2nd intercostal Left 2nd intercostal
space
space

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Accentuation with
On expiration
On inspiration
respiration

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MID DIASTOLIC MURMURS

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? Begins at a clear interval after S2 &ends
before S1.
? Causes ? mitral stenosis (located at apex &
axilla),Tricuspid stenosis(left sternal edge),
increased flow across the

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mitral valve tricuspid valve
MR ,AR,VSD,PDA TR, ASD

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CONTINOUS MURMURS
? One that begins in systole & extends through

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S2 into part or whole of the diastole.
? Rare in adults.

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Causes
High to low
Due to rapid blood Normal flow

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pressure shunts
flow through
through consticted
normal vessels
arteries

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PDA
Cervical venous hum
Coarctation of aorta
Tricuspid atresia
Mammary souffle

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Carotid stenosis
Pulmonary atresia
Hemangioma
Pulmonary artery
Coronary

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Hyperthyroidism
stenosis
arteriovenous fistula
Renal artery stenosis
Arteriovenous fistula

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Coeliac artery stenosis
(systemic &
pulmonary)

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