Heart beat. What is da issue?

My question is to someone who can help me, I've done my ct coronary, echo, tmt, All are normal, left with a key question, why my heart beat raises instantly when I smoke. Yes , I know the answer is stop or quit smoking. I've even done that. I know it's bad but I've been doing it for 40 years and now I'm 45. How come this issue is giving me concern . What is da issue? Normally my heart beat is 70-80 , in fact in rest at night it's 60-65-70 , known as I take ciplar la20. but moment I eat my breakfast it goes 85-90 and post one drag if smoke it raises to 100-110 ...pls answer my query. Yes I have gastric issues, like hitous hernia grade 3 and reflux issues for which I'm eating veloz 20 before break fast from last 2.5 years