Question

Effect of adrenaline on heart

Answer 1

Epinephrine, more commonly known as adrenaline, is a hormone secreted by the medulla of the adrenal glands. Strong emotions such as fear or anger cause epinephrine to be released into the bloodstream, which causes an increase in heart rate, muscle strength, blood pressure, and sugar metabolism

However, too much adrenaline and noradrenaline can be dangerous to the heart, brain, and other organs. ... In patients with pre-existing heart disease, the fight-or-flight response can also dislodge arterial plaques, sending blood clots to the heart,causing a heart attack, or to the brain, causing a stroke.

in depth,It has been found that adrenaline (1) shortens the contraction phase, (2) accelerates the speed of contraction, (3) increases the emptying of the left ventricle, (4) increases the amplitude of the first and second heart sounds, (5) lowers the pressure