Echocardiogram | Electrocardiogram | |
Major criteria | LV wall thickness ⩾13 mm in the anterior septum or posterior wall; or ⩾15 mm in the posterior septum or free wall | LVH and repolarisation changes |
Severe SAM (leaflet–septal contact) | T wave inversion in leads I and aVL (⩾3 mm, with QRS-T wave axis difference ⩾30°), V3–V6 (⩾3 mm) or II, III and aVF (⩾5 mm) | |
Abnormal Q (>40 ms or >25% R wave) in at least two leads from II, III, aVF (in absence of left anterior hemiblock), V1–V4; or I, aV1, V5–V6 | ||
Minor criteria | LV wall thickness of 12 mm in the anterior septum or posterior wall; or 14 mm in the posterior septum or free wall | Complete BBB or minor interventricular conduction defect (in LV leads) |
Moderate SAM (no leaflet–septal contact) | Minor repolarisation changes in LV leads | |
Redundant MV leaflets | Deep S V2 (>25 mm) | |
Unexplained chest pain, dyspnoea or syncope |
BBB, bundle branch block; HCM, hypertrophic cardiomyopathy; LV, left ventricle; LVH, left ventricle hypertrophy; MV, mitral valve; SAM, systolic anterior motion.