I lied at MEPS. Will they go back and look through my medical records?

The Cardiologist will run tests to see the extent of the murmur. Probably an EKG, Echocardiogram, sonogram, and others. He/she will then recommend whether to induct you or not,. By now they should have contacted your physician for your records.

as a former NAVY recruiter, I would not advise you to lie to enlist as that is a Dischargeable offense.

If you believe the doctors from when you were six, that you would grow out of it, then accept that diagnosis and let the doctors' at the MEPS station determine if you currently have a heart condition (murmur, flutter, whatever), as that is their job, and you may well have grown out of the condition.

The “Correct Answers” about your personal medical history as a minor child is “No, None and Never.”

If something crops up after enlistment then you get a “No Fault Admin Discharge”...and a “Thanks For Trying, Kid” Pat on the back.

If you want everyone focused on your medical history, then give them the targeting data, and you will never get started in any military career... you just gave them a reason to not waste their time or money on you.

Repeat after me:

“No...None...and Never.”

Be healed my son, and get your National Service started.

Hey boss man
Ya shoulda kept that to yourself
Goes back to old school army “don’t ask don’t tell”

I wouldn't worry about it. During your physical, the doctor listened to your heart and could easily determine if your heart murmur would be a problem.

i told them the truth at the recruiters, recruiters told me to hide it. Mostly as it's an Athletic Heart Murmur , i was 6 as well. Most athletes have the same heart murmur. Needless to say in my military career they never found out or if they did made no big fuss.

Lying no matter what is never goid,but to lie and publicly announce it is not so smart either. Part of joining the military means that you want to serve your country and be respected for it,but to be respected you need to be honest and have a high degree of integrity and honor to serve the best way you can. It looks like you have already failed at the gate. Best policy is to admit your wrong doing, and offer a way to repair what you damaged, TRUST.

I served from 1979-1983 (Active Reserve). ARMOR Platoon Leader on M60A1s.
I was 26 when I ETS. A murmur was found by a cardiologist when I was about 35. At 55, I had my aortic valve replaced. There is no way to know when it started. Technology was not as good as today. FIND OUT. Take care of your heart. Start taking CoQ10 (200mg daily), 81 mg Aspirin nightly, Magnesium, good multi-vitamin. I now have Congestive heart failure at 60 and a pacemaker at 61.

I shot a man in Reno - just to watch him die.

OK! Here’s the deal!! Lying obviously no good, and You may not have any issue with that condition now! But heaven forbid if something comes back up while you are in service. They will do their own research with your diagnosis. And if it’s something severe enough to be discharged for, you might be forced to discharge without benefits. Because they might find it pre-existing!
Just be careful & Good Luck!