Hmm… My doctor looked at my echocardiogram and never mentioned anything but tachycardia throughout. She had me take my atenolol 45 minutes before the echocardiogram too. Which i dunno got a proper reading of my heart or not because i think the medication would mask it even if tachycardia was present. I was uncomfortable 😛 i didnt wanna be there lol. The guy told me to calm down but the woosh noises of my heart were too scary 😛 im not even sure if my chest concaves or not. :S i know i can feel that chest bone that pops out. But if my chest does concave, its not very noticable xD all i’ve known my whole life was people telling me i should gain some weight because it wasnt healthy and im like… I try! I really do. I eat! XD i promise!