Wow,
@Happi - I am sorry to hear you are having that problem. It sounds scary needing to have such an invasive surgery.
My recoveries have all been orthopedic. I've fortunately never needed heart surgery - the closest being that I have a mild mitral valve prolapse that disappears with exertion. Some dental operations require antibiotics for this, and it's always something taken into account with my orthopedic repairs.
I've had the luxury of being retired for a long while so I treat my recovery as my full time job. With some orthopedic surgeries like my knee replacement, it was not likely I could damage the prosthesis with any movement I was able to perform, so I pushed hard and used my body swelling up or responding with pain as a guide to how much I could sustain. I did a lot more than suggested and luckily my body responded well.
With other surgeries like my rotator cuff repair, there are soft tissues that needed time to grow strong enough and to incorporate the manner of the repair. My shoulder had a couple of holes drilled into the bone for anchors, and then my rotator cuff was stitched to these anchors. There is just a fixed amount of time necessary for that to get strong enough and pushing too hard too early can tear the repair. That being said, the typical guidance is usually very conservative because they want the rate of reinjury to be very, very low. So I play within that margin, probably much to the consternation of my ortho. I was willing to create greater risk of reinjury to shorten my recovery time.
In both cases though, I found that nutrition is vital. These last two operations involved trauma to bone and soft tissues so I eat a really clean diet full of high quality protein, calcium, and collagen. My breakfast was a big scoop of whey protein and a big scoop of collagen, supplemented by a calcium supplement and vitamin D to aid absorption. Lunch would usually be a can of salmon with the bone, and for dinner I'd eat 93% fat free ground turkey with teriyaki or bulgogi sauce. I'd always finish the day with some protein and collagen as well.
In your case since you have calcification that's being removed, and that you're not having anything done to your bones, you probably don't need calcium supplementation. You may not need collagen supplementation either. And yes, I know that the evidence of collagen supplementation in healing is not clearcut but I think it really does help the scarring on my skin to heal better. Your surgeon would be best able to help guide your recovery and if I were in that situation, I'd have a discussion about what I could do to push the recovery process so you at least know what alternatives may be available.
Two last things. One is that with both of these last surgeries, I tried to maintain my weight after surgery. As I got into the meaty part of the rehab, I just didn't feel like my recovery from workouts was a good. I then ran a daily 500 calorie surplus and felt much better. It's unfortunate to have gained a few pounds but I truly believe it helped my body heal quickly.
Second is that with my rotator cuff surgery, I used a product called a "scar strip". It's a stretchy, transparent rubber sheet that you can cut and adhere it to the surgical incisions after they have closed up. I tend to keloid badly but I used this on the five holes that were made for my rotator cuff, along with a longer incision to remove a cyst in my back, and there has been no keloiding at all. The scars are also much lighter in color. I wish I used this product for all of my other incisions.
Best of luck to you!
