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Hypertrophic Cardiomyopathy

Hypertrophic Cardiomyopathy

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 video 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.


Auscultation Sounds

auscultation sound from lesson
waveform





Position

Patient position
The patient's position should be supine.

Listening Tips

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


Waveform (Phonocardiogram)

Observe

//embedding heart animation
Observing the animation, 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.

Authors

These authors contributed the audio recordings and text found in this reference guide: Jon Keroes, MD,Diane Wrigley, PA, and David Lieberman.
Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.

Sources


Sources




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