Spade shaped Left Ventricle in Apical variant of Hypertrophic Cardiomyopathy (or Yamaguchi HCM)
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RAOprojection
demonstrating
a "spade"-shaped left ventricular (LV) cavity, suggestive of apical
variant hypertrophic cardiomyopathy (HCM). Contrast agent appears dark and
defines the narrow channel-like apical cavity (white arrow). At the apex, there
is increased myocardial thickness (black arrows). Also seen are the
dual-chamber pacemaker leads (asterisks).
Spade shaped Left Ventricle in Apical variant of Hypertrophic Cardiomyopathy (or Yamaguchi HCM)
Apical HCM is uncommon form of HCM which is seen most frequently in Japanese patients (25% of all HCM cases in Japan and 1-2% outside japan). It is characterized by localised hypertrophy of LV apex, causing a “spade-shaped” configuration of the LV cavity on ventriculography. Classic ECG finding in apical HCM is giant T-wave inversion in the precordial leads.
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