My pulse was at 77 and it shot up to 150 after a cigarette and it wasn't coming down is that normal? i thought i was heart attack bound

Nicotine stimulation: Cigarette smoking is a stress on heart and lungs which are acting as a circulation and oxygenation unit for the body. Nerves are stimulated by the chemicals inhaled and oxygen is deprived with smoke and such response is a heralding sign of early cardiac dysfunction. Please get a stress test for your heart.

Quit: Nicotine in cigarettes can cause tachycardia - quit smoking, it is truly awful for your health.