Yes, there is such thing as the heart brain. Apparently, heart contains dopamine, adrenaline, and oxytocin, which would typically be found in your brain.
Now, there is probably nothing shocking about that. Both brain and heart belong to one body, with blood and lymph floating and nourishing both organs at all times. One depends on the other. Logically, they connect.
What if you face a heart transplant though?
What if heart being transplanted still contains some hormonal remains from their original 'holder'?
What if that goes into new place, where there are already some strong hormonal relations created?
How that redefines the transplant refusal risk?
Sometimes I wish I followed footsteps of many of my relatives... I could be a doctor by now, or a qualified nurse, or a genetics expert. I would have so much more knowledge at my disposal...