On echo ivs is 1.1cm, but on cardiac mri ivs is intact measuring 1.0cm. is cardiac mri better and more accurate test than echo for measuring ivs(septum)? what is gold standard test for ivs(septum) measurement?

Echo is very operator dependent and thus MRI is thought to be more accurate. Many more “cuts” can be viewed. Remember we are trying to measure wall thickness in a beating/moving heart. A difference of only 0.1 cm is within range of repeatability. ESP with echo. Might want to Google them and compare. Then discuss with a dr who has reviewed both.