Yasuo Amano1, Masaki Tachi1, Hitomi Tani1, Shinichiro Kumita1, Makoto Obara2
1Nippon Medical School, Tokyo, Japan; 2Philips Healthcare Asia Pacific, Tokyo, Japan
Apical hypertrophic cardiomyopathy (APH) showed myocardial hypertrophy and scarring dominantly in the left ventricular apex. The mass percentage of myocardial scarring is associated with the decrease in the LV ejection fraction and traditional risk factors plus family history of hypertrophic cardiomyopathy in APH. Conversely, we do not have to quantify myocardial T1 value for the risk stratification of APH, because the T1 value did not differ between the apex and other non-hypertrophied myocardium and had no association with the risk factors.