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

Heart murmurs are no big deal, many children have them. Many, many people don’t know their medical history so lying about something like that would be hard to prove or disprove. I doubt your medical records from back then even exist. You wouldn’t believe how many people think they are allergic to penicillin that aren’t; are they lying: probably not. Are they confused about their medical history: yes, like most people. The military has much bigger things to worry about than a heart murmur from your childhood.

All I will add is that 50% of soliders lied at maps but it's all up to you of you choose to ride along and make it in the military because if you are caught you might be in a lot of legal trouble but if you are not then your good until you might have a heart problem down the road. Some good advice dont post stuff like this online because everyone who is a blue falcon will see it and report you

Lying is one thing but if you were coached by your recruiter it’s another. My recruiter told me to tell them absolutely nothing. To not tell them I grew out of asthma and had broken my ankle. My conscience got the better of me though and I told them after not putting it on my record, which lead to me being brought into an office and giving a statement about how I was told to not disclose anything to MEPS.

If you ever file a claim with the VA or DOD that has anything to do with your heart they will use it to deny your claim, but a military DR. found it and you were still admitted so that is in your favor but from now on keep your mouth shut.

Integity is a very important thing. The fact you lied would suggest you have little to no integrity. You need to re-evaluate some things in your life because you aren't ready to join the military. These things are very important. You're not in grade school and you need to grow up a bit.

I think he can judge his own health issues.

They might, you are taking a huge risk with your life and possibly others by enlisting with a heart murmur. They could throw the book at you and charge you with fraudulent enlistment which carries some stiff penalties including jail time. I think it really depends on what the doctor says. If the doctor says your fine, you may be in the clear. If not and you pursue enlistment further, are you really that willing to roll those dice? Recently a few sailors dropped dead after PT at the Navy's boot camp in Great Lakes, IL, never learned why but I would suspect a similar condition. Going in with a possible heart condition and getting PT'd every day could be the straw that broke the camel's back. Then they will go through all your records. Not worth it. Military service carries enough stress that even the best burnout in a few years. You need to see what the doctor says and go from there. If there is still a hint of it, tell the recruiter and go from there. It's not worth it.

I'm just seeing this post and it's now mid-May, so my thoughts/comments might be moot at this point. Having been part of the big draft for Viet Nam (and the Cold War), I saw lots of guys that SHOULDN'T have been drafted due to health issues, including heart murmurs, actually get drafted and try to convince Army Doctors they were a risk to themselves and others due their history. Some got "dragged along" for weeks before finally being released. Some were classmates of mine that hadn't been able to participate in Gym for those reasons. That being said, I wouldn't want someone serving under me, whether on my personal tank crew, my platoon, or in my company, that had the potential to put any of us at risk because of YOUR health issue or issues. Additionally, if you felt it was ok to lie about that...well, what else was "fair game" ?

Apparently your recruiter didn't feed you a big enough bottle of STFU

When I was on Navy recruiting back in the late 80's...we would take you and brief you on how to beat the MEPS doctors. This included having Navy rep's at MEPS put you in back during the physical exam (the doctors would be tired and more likely to overlook you), telling you what answers to give to questions as well as having MEPS folks see to it that you never actually saw the doctors by rotating the physical charts (unless the doctor personally knows you, they'd miss it). It was a dirty business and I did only a year before accepting reassignment back to the fleet. This is when I decided not to take any more advancement exams as I was fed up with Chief's who were absolute frauds.