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Doctor insights on: Why Does Epinephrine Increase Heart Rate

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Why does epinephrine increase heart rate?

Why does epinephrine increase heart rate?

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. ...Read more

Heart Rate (Definition)

Heart rate is a measurement of the number of times a person's heart beats in one minute. Normal heart rates vary with a person's age and with excitement and exercise. Abnormal heart rates are too slow, too fast, and/or irregular (too much ...Read more


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What makes heart rate increase during exercise besides epinephrine?

What makes heart rate increase during exercise besides epinephrine?

Many factors: Humidity, altitude, oxygen tension, thermal are just a few examples. Dehydration as well as increasing the core body temp are very influential on raising your heart rate. How good your fitness level is also important. ...Read more

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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?

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?

Epinephrine: After over 40 years of dental practice I have had only a handful of patients who truly are sensitive to Epinephrine in local anesthetics. Almost all patient who say they react with an increased heart rate do so because of the release of their own epi due to anxiety, or react from poor injection technique. Ask your dentist about the use of sweet air instead of valium. Btw ok with precautions. ...Read more

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

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

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. ...Read more

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28 yr-old with 8 yrs of autonomic, endocrinologic, and inflammatory symptoms, which have both a daily pattern and a seasonal pattern.....?

28 yr-old with 8 yrs of autonomic, endocrinologic, and inflammatory symptoms, which have both a daily pattern and a seasonal pattern.....?

Psychologial Tx of physical problems: Andrew, your symptoms indicate the strong possibility of being the consequence of conditioning from earlier life experiences. I say this because of their cyclic nature, the act hat the symptoms are physical does not preclude the cause being psychological.

I urge you to visit www. Stii. Us for expanded information on this possibility. Treatment by Subliminal Therapy is my first recommendation with Hypnotic methods being second (www. Asch. Net for a referral for hypnosis).

Medications can mask symptoms but do not address the problem itself. When you resolve the cause of a problem, you eliminate its symptoms.

Best wishes, Dr. Yager ...Read more

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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?

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?

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

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

Look for cause.: Beta blockers are very effective in controlling excess adrenergic activity. If they are not effective, perhaps the underlying cause should be thoroughly investigated. Excess anxiety can sometimes cause this as can tumors of the adrenal medulla. Consult your primary care or an endocrinologist for advice. Thanks for trusting HealthTap! ...Read more

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

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

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!! ...Read more

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Does adrenaline affect heart rate?

Does adrenaline affect heart rate?

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. ...Read more

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Been on armour for two months was on synthyroid for 20 yrs, feeling better but certain days I feel like I'm on an adrenaline rush, heart rate 95bpm?

Thyroid replacement: This is why most endocrinologists don't use armour. It contains a mixture of hormones, and often does makes you hyperthyroid. And it is hard to follow the blood tests. ...Read more

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In what situation does your adrenaline really kick in? Heart rate and blood pressure go up?

In what situation does your adrenaline really kick in? Heart rate and blood pressure go up?

Fight or flight: During periods or stress or peril our body compensates by releasing adrenaline (norepinephrine) to increase our abilitly to repond to those situations. ...Read more

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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?

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?

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. ...Read more

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Potential anxiety suffer, no heart issues from pcp, I exercise I feel fine until my heart rate / adrenaline kicks in and I feel jelly legs and dizzy?

Anxiety: I understand your distress.
Commend yourself for good functioning heart.
Decrease pace and duration 0f exercise.
Experience Wonder of Niagara Falls in your State.
Feel good about your achievements in your journey of life of 43 years.
Feel Blessings of your Body and Mind, do not focus on Anxiety
Do Breathing and Music Relaxation, Yoga, Meditation.
See Psychiatrist for Therapy for stress in Life. ...Read more

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Can bisoprolol withdrawal cause hyperthyroidism? I've had a Fast heart rate, aches on my legs, back. And feeling tired from that adrenaline feeling

Can bisoprolol withdrawal cause hyperthyroidism? I've had a Fast heart rate, aches on my legs, back. And feeling tired from that adrenaline feeling

May feel like it: bisoprolol is a beta blocker and needs to be tapered off gradually depending on your dose and the length of time you have been on it. If you stop it abruptly you will have tachycardia, possible palpitations and feel generally terrible. Yes those symptoms are similar to hyperthyroid symptoms! See your doctor! Your blood pressure is probably high too!!! ...Read more

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What is the best treatment for episodes of hypertension caused by adrenaline surge causing elevated heart rate and spikes in BP?

See endocrinologist: Hi. You could be describing something serious. I suggest you see an endocrinologist for evaluation. ...Read more

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Is it possible to have high levels of adrenaline if blood pressure is on low side but heart rate is high (resting 90-105) (exercising 175-200)?

Possibly: There are rare disorders where adrenaline levels are high. You can see an endocrinologist to help see if you have one. The more likely explanation is elsewhere- perhaps anemia, caffeine, medications (cymbalta (duloxetine) can do this), or heart related. ...Read more

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What can cause the feeling of rapid heart rate (not going over 100) and a adrenaline (nervous/excited) feeling in chest and abdomen? Not anxious!

What can cause the feeling of rapid heart rate (not going over 100) and a adrenaline (nervous/excited) feeling in chest and abdomen? Not anxious!

Nervous/anxious: You can't have it both ways. You cannot be "nervous/excited" and not be anxious.

Two options:
Contact your doctor.
Consult a Psychologist - they are experts on anxiety. ...Read more

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What can cause rapid heart rate (up to 174 bpm), severe headache, rapid breathing, adrenaline rush to occur multiple times a night every night.

What can cause rapid heart rate (up to 174 bpm), severe headache, rapid breathing, adrenaline rush to occur multiple times a night every night.

See your Doctor: All these symptoms are a warning that are telling you to be seen, when we lie down fluid changes in our system can trigger underlying heart disease and trigger some of your symptoms, and could also be an endocrine (gland and hormone) problem, so please get to your Doctor and get this evaluated right away! ...Read more

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I have chest pain and increase heart rate?

I have chest pain and increase heart rate?

Chest pain: Lots of possible causes for chest pain and increased heart rate. Need to see a doctor to work out. ...Read more

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Why does increased heart rate after I use inhaler?

Why does increased heart rate after I use inhaler?

Inhaler use: Depending on the inhaler you are using there are possible side effects. Albuterol which is a common rescue asthma inhaler can cause your heart race to increase.
Discuss this with your physician. ...Read more

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I know nicotine is a vasoconstrictor--does raise the heart rate?

I know nicotine is a vasoconstrictor--does raise the heart rate?

Yes and no: As nicotine constricts the coronaries, it also increases vascular resistance to blood flow. For the heart muscle to receive adequate blood flow, it has to increase heart rate so that per unit of time and rate, diminished blood flow is compensated. Subsequently, cardiac output increases and blood pressure will also increase. A severely high BP may in time slow down heart rate as a reflex mechanism. ...Read more

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Why does my heart rate increase when I listen to music? Is this normal?

Why does my heart rate increase when I listen to music? Is this normal?

It may be: The heart rate is affected by emotional factors and music can have powerful emotional effects. Music with a fast, "jumpy" beat can be especially so. ...Read more

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What can I do if my heart rate has increased. Should I still take my accutane?

What can I do if my heart rate has increased. Should I still take my accutane?

Maybe not: It can cause arrhythmia and rapid heart rate. And many, many other side effects. You need to stay under the care the provider who prescribed it for you! ...Read more

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I was hospitalized for slow heart rate, what can I do on my own to raise my heart rate?

I was hospitalized for slow heart rate, what can I do on my own to raise my heart rate?

Nothing much: Unless you're taking certain meds that can slow the hr, nothing you can do to increase your resting hr. There are a few potential causes for sinus bradycardia but make sure you don't have something else such as heart block. Assuming you were hospitalized because of symptomatic bradycardia (slow hr), you need further eval. And f/u with a cardiologist and possibly an electrophysiologist. Good luck. ...Read more

Dr. Katharine Cox
463 Doctors shared insights

Adrenaline (Definition)

Adrenalin (e) / Epinephrine is the hormone produced by the adrenal medulla that speeds and strengths the heart, dilates the airways, and shifts blood flow to the muscles. Often this is in response ...Read more


Dr. Mohammad Shahzad
1,002 Doctors shared insights

Epinephrine (Definition)

Epinephrine is a rhythm control agent which is a ...Read more