Question 1

why does epinephrine increase heart rate?

Accepted Answer

Binding receptors: Do you mean how does it increase heart rate?  The mechanism of action is quite complicated but in simple term, it binds to the beta adrenergic receptors on the heart leading to changes in calcium level and increases in the firing rate of the pacemaker cells.

Question 2

what makes heart rate increase during exercise besides epinephrine?

Accepted Answer

Normally your: Heart is slowed by the vagus nerve, removing the vagus effect increases your rate then the catecholamines take over for further increase

Question 3

can't use epinephrine i get rapid heart rate, endodontist wants to give me 20 mg valium crushed 1/2 hour before root canal.  is this ok?

Accepted Answer

Should be fine: Actually the Epinephrine in dental work is injected with the novocaine to keep the pain killer in place rather than it leaking out into the circulation. Very little of the eli leaks into the circulation either, and hardly anyone has problems due to it. Check w/your dentist.

Question 4

what are norepinephrine and epinephrine's effects on heart rate, blood pressure, vasoconstriction, sensitivity to pain, and heat production.

Accepted Answer

EPI: It increases heart rate and blood pressure (sometimes dangerously). It causes vasoconstriction. Variable effect on pain but generally increases sensitivity and because it ramps up your metabolism it increases heat production.  Follow your docs instructions very carefully and don't freelance.

Question 5

besides being on a beta blocker, is there a way to control random adrenaline surges which raise heart rate and blood pressure?

Accepted Answer

Depends..: If you have pheochromocytoma.......you need different treatment...even surgery....need further check up.

Question 6

can heart rate increase without an increase in adrenaline? singing to yourself for example, thus no pressure or stress, but still faster breathing.

Accepted Answer

Explanation : Yes! Absolutely!  Heart rate increases not only with stress or physical exercise, but with any positive impression. Singing is physical activity and still adrenaline as positive component. Enjoy!!

Question 7

i always had this ability to turn adrenaline rush on/off at will easily (dilated pupils, increased heart rate etc).
should i visit a doctor for this?

Accepted Answer

Doubtful: Interesting ability but, if there are no other issues, it doesnt sound like a medical problem, unless it's happening when you are not paying attention to it.

Question 8

i have pots and sometimes when i experience a fast heart rate, i get an instant intense buzzing all over even if i keep my breathing very slow. due to fast hr, adrenaline, or a different cause?

Accepted Answer

Check out these: Links. I presume your dr has checked u for thyroid disorder and arrythmias. Take care and god bless u!                                             http://www.Ninds.Nih.Gov/disorders/postural_tachycardia_syndrome/postural_tachycardia_syndrome.Htm.

Question 9

does adrenaline affect heart rate?

Accepted Answer

Very much: Very  much. That is why under extreme circumstances, specially dangerous one your body produces it to keep you very alert with increase heart rate.

Question 10

can anxiety cause faster heart rate? i feel like my adrenaline is up (fight or flight). my pulse feels a little fast too... kind of nervous?

Accepted Answer

Yes: Anxiety states can accelerate the heart rate(which you feel when taking your pulse). However if the heart rate exceeds 100 per minute then i would get checked for other causes of rapid heart rates such as overactive thyroid, fever, anemia, caffeine excess, etc.

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Doctor answers about:

Why does epinephrine increase heart rate

A member asked:

Why does epinephrine increase heart rate?

A member asked:

What makes heart rate increase during exercise besides epinephrine?

A member asked:

Can't use epinephrine i get rapid heart rate, endodontist wants to give me 20 mg valium crushed 1/2 hour before root canal. is this ok?

A member asked:

What are norepinephrine and epinephrine's effects on heart rate, blood pressure, vasoconstriction, sensitivity to pain, and heat production.

A member asked:

Besides being on a beta blocker, is there a way to control random adrenaline surges which raise heart rate and blood pressure?

A member asked:

Can heart rate increase without an increase in adrenaline? singing to yourself for example, thus no pressure or stress, but still faster breathing.

A member asked:

I always had this ability to turn adrenaline rush on/off at will easily (dilated pupils, increased heart rate etc). should i visit a doctor for this?

A member asked:

I have pots and sometimes when i experience a fast heart rate, i get an instant intense buzzing all over even if i keep my breathing very slow. due to fast hr, adrenaline, or a different cause?

A member asked:

Does adrenaline affect heart rate?

A member asked:

Can anxiety cause faster heart rate? i feel like my adrenaline is up (fight or flight). my pulse feels a little fast too... kind of nervous?

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