Ha, well nothing really. It isn’t negatively affecting the heart function because it isn’t pressing on it. The sternum is just “resting” on the of the left ventricle. In the past if I was working out in a bent forward position I could feel the heart gallop a little trying to push blood through the left ventricle, because with the sternum resting there the heart has more trouble expanding for higher blood flow, but only if I am bent forward. There is no way to straighten the sternum other than a highly invasive and dangerous surgery, of which at my age the survival percentage is low. They perform it on kids with deep pectus excavatum, but adults are a very different story.
We can work with manual physical therapy on the thoracic to keep loosening up the ribcage, intercostal cartilage, spine, and fascia, but that is about it.
Minor scoliosis can be managed and sometimes easily fixed just through physical therapy, proper physical therapy alignment exercises, and breathing correctly. Supposedly even through proper supplements these days, but pectus excavatum is an entirely different beast. The spine is flexible and so can be manipulated, but the sternum is solid bone and cannot be unbent.
Also with pectus excavatum, whether naturally occurring in childhood, or developed from severe thoracic trauma, causes the ribs to misplace and the intercostal cartilage (what connects each rib to the spine and sternum) to grow excessively in order to span the increased space between rib and spine/sternum. This in turn allows the ribs to float and displace more easily than normal ribs. The depth of the sternum inward bend also compromises the expansion and contraction of the diaphragm, and thus lung capacity as well. Naturally, all that pulls on the spine too.
My non-medical guess is that if you have mild scoliosis I bet it could be managed easily through proper physical therapy. My PT has worked with hundreds of people with mild scoliosis with great success. But I have zero understanding of your entire condition, so I’m just throwing out general info here.
As to the story about the woman with spine injury and resulting chronic pain - there is nothing strange at all about a Kung Fu master helping her heal. I am a grandmaster in jujitsu and have helped many people through the years heal from various injuries.
A side story:
About 13 years ago a student of mine said his girlfriend was having health issues and no doctor could figure them out. She was almost incapacitated with them, and they had come on pretty suddenly. She had test after test, visits to specialists across the country and nobody could figure out what was wrong with her. My student asked if he could bring her up and have me look at her. I said sure.
The next weekend they drove in from out of state to my house. I had set up a treatment table outside on the back deck. We lived on a dead end dirt road in the middle of nowhere, much like we do now, and it was a warm sunny day. My student went for a walk in the forest while I worked with his girlfriend. I had her lay on the table. I worked with meridians and points for about an hour. Afterward my student returned and the three of us sat to talk.
I told her she had something in her blood that didn’t belong there and was the root cause of her health issues. I said it was minuscule but very potent, and was starting to invade her organs. My recommendation was that she get extensive blood work done by an infection disease specialist.
They went home and she did as I suggested. In two weeks she had all the lab results and found out she had contracted a rather nasty blood parasite. I asked if they knew where it came from. She confessed she had taken a trio to Africa three weeks before visiting with me.
Anyway, they got her on treatment and she made a full recovery.