Where is there anything saying TRiS buffer is used to prevent heart attacks? It is more stable, pH-wise, than typical PBS, but IDK about this claim…
"Tris-buffered saline (TBS) is isotonic, notoxic buffer used in some biochemical techniques that is maintain the pH within a relatively narrow range."
https://www.protocolsonline.com/recipes/buffers/tris-buffered-saline-tbs/