

Hi there!
Steady heart rate is good for an individual. However, it should not slow down as it will not pump sufficient amount of blood to maintain the vital processes of life. Likewise, it shouldn't be too high as it will constraint the heart to take extra effort to pump blood at such a fast rate.
In any case, cigarette smoking is injurious to health. As its consumption exposes an individual to carbon monoxide which is a highly poisonous gas. It binds very tightly with haemoglobin molecules, thereby choking the person to death due to carbon monoxide posioning!
Thanks
