Aman Trivedi
The primary addictive substance in tobacco 'Nicotine', stimulates the release of adrenaline, a hormone that increases heart rate within seconds or minutes after smoking.
Nicotine also causes blood vessels to constrict which increases blood pressure.
Tobacco smoke contains carbon monoxide, which competes with oxygen for binding to haemoglobin in red blood cells, this reduces the amount of oxygen in the bloodstream
smoking can trigger irregular heart rhythms such as atrial fibrillation, which can increase the risk of stroke and other cardiovascular complications.
Smoking can promote the formation of blood clots by altering the function of platelets and promoting the buildup of plaque in the arteries.
Coronary and other arteries can go into severe spasms which can increase blood pressure which in turn increases stress to the heart.
All these together can decrease cease blood supply to the heart and increase demand, this imbalance causes heart attack, and can also trigger paralysis.