Echo - who to believe?

Did an echo last month, after an acute episode of atrial flutter. The report said "A normal sized left ventricle with minimal septal hypertrophy. The left atrium is borderline dilated". I think they meassured my septum to 13mm. Since I was worried for HCM, I got a new time for an echo, which did this friday. The new report said ""A normal sized left ventricle with normal wall thickness. The left atrium is borderline dilated". This time they meassured septum to 10mm. What am I supposed to believe? I get no good answer when asking the doctors. Hopefully, the first echo was wrong.

[skipolot]

I understand your frustration....I know that 13 mm is not that far from normal anyway because 12 mm is considered normal...doesnt it drive you crazy when they make you think you are crazy when you ask for explanations....they never undestand cause they are not in our shoes...when you talk about your heart and something being wrong it is a scary thing...but I wouldnt worry too much sounds like the first one you had may have been off

[anacyde]

Sounds like possible variations within normal limits.