I'm very sensitive to nicotine and that's because I suffer from Tinnitus (part of my balance disorder) and the reason why I will copy and past here:
"Tinnitus may also be a symptom of more serious illnesses such as high blood pressure, anxiety/depression, diabetes, thyroid disorders, Meniere's disease, blood vessel disorders, or tumors"
So in essense, even though I don't have high blood pressure (of the noticable sort anyway). I get alot of tinnitus after vaping because it messes with the capillaries (yes I suck at spelling) in my inner ear. I would get it if I rarely chain smoked but I get it quite often now with vaping.
I can't say if it's from an increased blood pressure of some sort or a decreased blood pressure of some sort but it's definiately attributed to one or the other so hence, it can affect the healing process. By how much? There is no way of really knowing. When I had an implant procedure in my mouth I was told to not smoke at all and low and behold I smoked away LOL and everything still turned out fine (in fact my oral surgeon marveled at how fast I healed when the smoking should've done the opposite).
My point is though that everybody's body is different and nicotine can still have an impact and that impact can depend on pre-existing medical conditions, your age (above all - imo), etc.
Since I feel that vaping (regardless if it's low nicotine content or not) you are still getting more nicotine in one shot than from traditional smoking. That's just the way I feel, so I would probably cut it down way more regardless or switch to non-nic as previously suggested.
