it is:
What is tachycardia?
The sudden, rapid racing of the heart is a condition called paroxysmal (PER-ok-siz-mahl) tachycardia (tack-eh-KAR-dee-ah).
What are the symptoms of tachycardia?
Depending on how fast the heart is beating, symptoms may include:
breathlessness
upset stomach
chest pain
weakness
fainting spells.
The attack may be over in minutes or may last for several days, with a heart rate that may range between 140 and 250 beats per minute. In most cases, tachycardia is not life threatening, but it can cause you to feel anxious or frightened.
What causes tachycardia?
Tachycardia may be triggered by conditions such as heart disease, an overactive thyroid gland, fever, or by drinking alcohol or caffeinated beverages.
What can I do to control tachycardia?
Self-help measures that may help slow down the heart rate include:
splashing your face with cold water
taking a slow drink of water
holding your breath for a moment