I am not a doctor or military pilot but I have lived with a heart murmur for many years. My doctor has assured me that it has no medical consequences whatsoever. It has never been an issue in Class 2 medicals for my PPL and I am still capable of passing that at 76. That, of course, may not be relevant for the stricter requirements for the military.
When it comes to travel insurance, most companies exclude it but my doctor assures me that he would support my claim if any company refused to pay out for any other problems associated with the heart e.g. heart attack.
Best of luck.
p1