Figure 3.

^99mTechnetium labeled 3,3-diphosphono-1,2-propanodicarboxylic acid (^99mTc-DPD) scintigraphy and echocardiographic images in Apo AIV cardiac amyloidosis. ^99mTc-DPD scintigraphy demonstrating grade 1 cardiac uptake and single-photon emission computed tomography demonstrating uptake in the septum (arrows). Transthoracic echocardiography images demonstrating increased biventricular wall thickness, impaired longitudinal strain, and a typical apical-sparing strain pattern with an increased septal apex-to-base strain ratio measured in the 4-chamber view. Images were acquired using a GE Vivid machine, and the strain assessment was carried out using Q-analysis on EchoPac.