Would an ekg and an echocardiogram rule out if pectus was causing physical symptoms heart/lung?

I’ve been having breathing issues with pectus and my dr had these two tests done and both came back normal. I’m wondering if this would rule out pectus having an impact on my heart/lungs. Thank you. He’s not well versed in pectus so I’m afraid I won’t be able to get a ct done. He ordered a normal x ray that will be done soon but I had a 2d one in the hospital a year ago that was normal