MRI images of the heart (IMAGE) University College London Caption MRI images of the hearts of a healthy volunteer (left), individual with HCM gene but no symptoms (middle), patient with overt HCM (right). Top: quantitative perfusion images showing defects in heart muscle blood flow (dark blue), bottom: cardiac diffusion tensor imaging (cDTI) showing evidence of disarray (dark blue). Abnormalities in perfusion and DTI occur even in the absence of overt disease. Credit Dr George Joy et al Usage Restrictions Only in relation to this study License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.