Is tachycardia (fast heartbeat) dangerous?

If someone consistantly has a fast heart beat (say 120 per minute plus) without any excertion consistantly for long periods of time, like months, is that dangerous?

Sounds dangerous, but is it really?

my HR was 120 - 135 until I stopped all caffine intake (which can speed things up) and stopped the thyroid meds that another doctor had put me on.
My cardiologist watches it (and some other stuff that I have) closely, but after a few changes my HR is in the 70s....anyways, I would talk with a cardiologist and see if there is anything that you should or could be doing to help bring it down ~ as far as deadly dangerous @ this point~I don't think it is, but after a long while (years) it can wear out your heart.

It can be, depending on their age if its a younger person you shouldn't be too consered if they middle aged or elderly that should not be happening.

It depends. As long as the person is not having any symptoms like faintness, short of breath, dizziness, chest pain... it should be ok, but they need to see a dr. If their heart rate is not normally that fast, they need to find out what is causing it.

It can be, best to have it checked out, better safe than sorry!

It is high and can e dangerous too, this article will help you understanding your problem:
The chances of developing tachycardia increase as a person ages. Fewer than one in every 100 people in their 50s has tachycardia, but about 10 in every 100 people in their 80s have it.

Most people with tachycardia have heart disease. Some people have coronary heart disease (hardening of the arteries). Others have different heart problems, such as:

* Long-term high blood pressure (hypertension)
* Abnormalities of the heart valves (thin tissues that keep blood flowing in one direction through the heart)
* Pericarditis, inflammation of the saclike covering of the heart (pericardium)
* Abnormalities of the heart's pumping function
* Dysfunction of the heart's natural pacemaker, (sinus node)

Some people who have tachycardia don't have underlying heart disease. The cause is often unknown. Possible causes include:

* An overactive thyroid or other metabolic imbalance
* Damage or microscopic abnormalities in the muscles of the atria (upper heart chambers)
* Abnormalities within individual heart cells
* Abnormal electrical properties of groups of heart cells
* Emphysema or other lung diseases
* Exposure to heart stimulants, such as caffeine, tobacco, or alcohol
* Rapidly firing triggers, ("hot spots") often located in the veins that return blood from the lungs to the heart (pulmonary veins) -- that cause atrial fibrillation.
Please see a cardiologist as early as possible.

depends if it is sinus tach due to exersice then not dangerous if it is atrila tach or rapid atrial fib then it is and if it is v tach ten she would be dead depend also on the symptoms that happen during the tachi arrhythmia

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