Fig. 18From: Magnetic resonance imaging of the papillary muscles of the left ventricle: normal anatomy, variants, and abnormalitiesAccessory papillary muscle mimicking thrombus. a Short-axis SSFP shows hypointense region in the ventricular apex (arrow), thought to be thrombus on echocardiography. b Delayed-enhanced images with an inversion time > 600 ms show that the structure is not hypointense (arrow), consistent with an accessory papillary muscle rather than thrombusBack to article page