Michels et al listed echocardiographic criteria for the diagnosis of hypertrophic cardiomyopathy (HCM). The authors are from Erasmus Medical Center Rotterdam and Albert Schweitzer Hospital Dordrecht in The Netherlands.
Exam: echocardiography
Parameter
Finding
Criteria
anterior septum
>= 13 mm
major
12 mm
minor
posterior septum
>= 15 mm
major
14 mm
minor
posterior wall
>= 13 mm
major
12 mm
minor
free wall
>= 15 mm
major
14 mm
minor
systolic anterior motion of the mitral valve (SAM)
severe (septal leaflet contact)
major
moderate (no septal leaflet contact)
minor
mitral valve leaflet
redundant
minor
The diagnosis of HCM is made if either of the following is found:
(1) >= 1 major criteria
(2) >= 2 minor criteria
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