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Stress triggers the release of adrenaline, which in turn can increase your heart rate, cause abnormal heart rythms and tachycardia.
Pneumonia, as any other infectious process in your body, can cause tachycardia. Sometimes, patients with pneumonia also become dehydrated due to lack of fluid intake. This also can lead to tachycardia.
Yes it can indirectly
No. I have it, and you are born with it.
No. However rhuematoid arthritis can cause heart damage.
it acts to increase heart rate
Check out the atropine page at wikipedia.org for your answer.
Yes, Mercury toxicity (such as from amalgam fillings) can cause hypertension, tachycardia, peripheral neuropathy, kidney damage, brain damage, etc., etc. Why aren't doctors checking for this?
No, it is not Paroxysmal tachycardia gives you the ability to watch the ``coming and going`` of tachycardia. Unsustained tachycardia has little to no change in rhythm rate.
hyperthyroidism or thyroiditis can cause tachycardia, or rapid heart rate.
Tachycardia - is an irregular heartbeat. It can either be temporary - lasting just a couple of seconds - or a much longer period. Prolonged periods definitely need investigating by a professional - in case there is an underlying cause that can be treated.