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Doctor insights on: Why Do Vasodilators Cause Tachycardia And Palpitation

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Why do vasodilators cause tachycardia and palpitation?

Why do vasodilators cause tachycardia and palpitation?

Vasodilators: Vasodilators do what the name implies: these compounds dilate blood vessels, resulting in a decrease in blood pressure. As the baroreceptors detect this, they command the autonomic nervous system to increase adrenaline output. This, in turn, increases heart rate and increases cardiac irritability. ...Read more

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Dr. Michael Gabor
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Palpitation (Definition)

Palpitations are an awareness of extra heartbeats which most of us have. The sensation can be single or multiple and can sometimes last minutes. Different people may feel other symptoms along with them such as dizzy, lightheaded or short of breath. The palpitations are almost always atrial or ventricular premature beats. Usually benign but they are also ...Read more


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I occasionally get palpitations and mild tachycardia (max 108) upon standing. No explanation after testing. Could sedentary lifestyle cause this?

I occasionally get palpitations and mild tachycardia (max 108) upon standing. No explanation after testing. Could sedentary lifestyle cause this?

Probably normal: however, there is a disease of the autonomic nervous system called positional orthostatic tachycardia (POTs) which could play a role. In addition, the medications you are taking could cause this as well. Ask your physician to evaluate your autonomic system if this becomes a clinical problem for you. In the meantime hydration is key to management. ...Read more

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7 months post large pericardial effusion. Weaned offcolchine. Takingverapimel to control tachycardia palpitations. What can cause palp to start again?

7 months post large pericardial effusion. Weaned offcolchine. Takingverapimel to control tachycardia palpitations. What can cause palp to start again?

See your MD: Your doctor can send you to cardiology to find out. The verapamil can slow down tachycardia and can block the common, regular pathway, but not alternative electrical pathways. Your cardiologist can find out. Also reconsider young lung medicine and either change or adjust dose especially of albuterol if you find it may be doing it. ...Read more

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Could obesity itself cause constant tachycardia(fast heart rate, even resting), heart flutters, and palpitations?

Could obesity itself cause constant tachycardia(fast heart rate, even resting), heart flutters, and palpitations?

No: Other things cause increase in heart rate. Obesity alone does not. Food that contain caffeine, diet supplements, stress, anxiety all can cause increase in heart rate. Hormonal imbalance can also be a cause. ...Read more

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I ve ovarian cysts 7yrs ago. Now lm having palpitations n tachycardia, malaise for de past 5mths. Dr suggest hyperthyroidism can it be the cause?

I ve ovarian cysts 7yrs ago. Now lm having palpitations n tachycardia, malaise for de past 5mths. Dr suggest hyperthyroidism can it be the cause?

Hyperthyroidism: Yes, hyperthyroidism can certainly be the cause of your symptoms. You need to follow up with your doctor to make the diagnosis and get treatment, and hyperthyroidism untreated can cause severe problems. ...Read more

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Sinus tachycardia heart rate 138. At home it's always less than 100.doc ordered ecg because I had palpitations.i hv palp at home as well.cause fr concern?

Be aware POTS & MPV: 23yo female having tachycardia & her MD is evaluating. Etiologies to keep in mind, related to her sex & age, are Hyperthyroidism, Postural Orthostatic Tachycardia Syndrome, POTS, Mitral Valve Prolapse, MPV & Joint Hypermobility Syndrome, JHS, which is associated with both POTS & MVP. Evaluation for JHS can be provided by an Osteopath, and via criteria provided in the "comments" section below. ...Read more

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Echo shows mv thickening and mild regurg. Tv mild regurg. Also, have palpitations regularly and inappropriate tachycardia. Worried?

Echo shows mv thickening and mild regurg. Tv mild regurg. Also, have palpitations regularly and inappropriate tachycardia. Worried?

Probably not: Mild mitral and tricuspid regugitation are common and rarely cause problems. The palpitations and tachycardia can often be treated with low doses of beta blockers. Best to see your doctor and ask for a holter monitor. ...Read more

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What is the difference between palpitations and tachycardia?

What is the difference between palpitations and tachycardia?

Fast vs irregular: Palpitations are irregular heart beats and tachycardia is a fast heart beat. ...Read more

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Often I have tachycardia, chest pains and sigh a lot. Is sighing connected to the palpitations?

Often I have tachycardia, chest pains and sigh a lot. Is sighing connected to the palpitations?

Can be: The tachycardia could contribute to chest pains. The sighing could be due to your breathing trying to up its ventilation rate during the attack. Have you had a doctor check you out and run tests ...Read more

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I can't find a definition of subjective palpitations. I have idiopathic tachycardia and was just doing some reading. I?

I can't find a definition of subjective palpitations. I have idiopathic tachycardia and was just doing some reading. I?

Meaning: Subjective palpitations means you feel your heart skipping or racing, but they haven't been documented. Objective palpitations means they have been documented. ...Read more

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Does glutamate affect the cardiological system? Could it play a role in tachycardia and palpitations?

Does glutamate affect the cardiological system?  Could it play a role in tachycardia and palpitations?

A bit too gee-whiz: Glutamate receptors exist in peripheral tissues, i.e., outside the CNS. Animal research in this field goes back 15-20 years. Cardiac effects in animal studies are indirect, i.e. neurally mediated. Not myocardium-mediated. Effects in humans at this point are mostly conjectural. There's a lot of totally unscientific sensationalist drivel on the Web about how bad MSG is. So no jumping to conclusions. ...Read more

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61 y female known cad.tachycardia all day 100-118 per minute with palpitations have appt with doc Tuesday is this soon enough?

Is this very recent?: Perhaps a phone call to the office might help. There is no reassurance that you won't have a ventricular tachycardia but being apprehensive with a physiologic tachycardia is not a severe warning sign, Cool it but call your doc for reassurance since I cannot interpret how you are feeling ...Read more

Vasodilator (Definition)

Blood vessels have the capability of increasing or decreasing their diameter. When a blood vessel dilates, it generally leads to lowered blood pressure. Drugs that cause this are termed vasodilators. These can act on arteries or veins. Some classes of vasodilators include nitrates, calcium channel ...Read more


Dr. Jerome Zacks
666 doctors shared insights

Palpitations (Definition)

Heart palpitations are a clinical finding in which a person feels his heart beating strongly, feels his heart beating fast, or both. This can occur with anxiety disorders or heart conditions including ...Read more