Auscultation Training by Repetition

Hypertrophic Cardiomyopathy - C402, #93

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Supine

Diaphragm

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S1: Increased intensity. Can be loudest at tricuspid area (4th ICS).
Systole: Diamond-shaped, early peaking, harsh.
Diastole: S4 gallop is present.

Repetition Training - Intermediate Heart Sounds

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Lesson Text

An early peaking, harsh diamond shaped systolic murmur starts at the beginning of systole and ends well before the second heart sound. A fourth heart sound gallop is also present in diastole as you can readily see on the wave form tab.

S1 is increased due to a hyperdynamic left ventricle. S2 is single.

On the anatomy tab you can see that the contraction of the left ventricle is strong and occurs in a reduced amount of time. Anatomically, the septal wall is very much thicker than the rest of the ventricle but this is not shown in the animation.

The strong contraction of the left ventricle causes the anterior leaflet to be sucked into the ventricle, blocking the flow into the aorta and causing an aortic murmur. At the same time turbulent flow from the left ventricle to the left atrium causes a second murmur. Since the two murmurs occur at the same time you hear a single murmur.

You can hear the difference between the two murmurs by moving the stethoscope head the aortic to the mitral valve area. First, you will hear the diamond shaped aortic murmur and later the rectangular pansystolic murmur.

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soundID	71
maneuver	Supine
Title	Hypertrophic Cardiomyopathy
Position	Mitral
realSoundID
caseID	93
S1	Increased intensity. Can be loudest at tricuspid area (4th ICS)
Systole	Diamond-shaped, early peaking, harsh
S2
Diastole	S4 gallop is present
features
lung sounds	False
chestpiece	Diaphragm

c402

CaseID	93
CourseID	26
CourseCaseOrder	7
ID	82