Tachycardia

Below you will find more information about Tachycardia from Medigest. If you believe that you are suffering from any of the symptoms of Tachycardia it is important that you obtain an accurate diagnosis from a medical professional to ensure that you obtain the correct medication or treatment for your condition. There are medical conditions that carry similar symptoms associated with Tachycardia and therefore the information provided by Medigest is offered as a guideline only and should never be used in preference to seeking professional medical advice. The information relating to Tachycardia comes from a third party source and Medigest will not be held liable for any inaccuracies relating to the information shown.

Definition

A heart rate over 100 beats a minute is known as tachycardia. Some tachycardias are relatively benign and need no treatment, but others can be life-threatening.

Diagnosis

Tests that monitor the heart rate -- such as electrocardiogram (ECG), holter monitor, and event monitor -- can help in diagnosing tachycardia.

Treatment

Treatment of tachycardia is typically directed at chemical conversion (with antiarrhythmics), electrical conversion (giving external shocks to convert the heart to a normal rhythm) or use of drugs to simply control heart rate (for example as in atrial fibrillation).

Symptoms and Signs

Some symptoms include: dizzines, shortness of breath, lightheadness, rapid heartbeat, heart palpitation, chest pain, blackouts, visual problems, and fainting (syncope).

Causes

An increase in sympathetic nervous system stimulation can lead the heart rate to increase, both by the direct action of sympathetic nerve fibers on the heart and by causing the endocrine system to release hormones such as epinephrine (adrenaline), which have a similar effect. Increased sympathetic stimulation is generally due to physical or psychological stress (the so-called "fight or flight" response), but can also be induced by stimulants such as amphetamines.

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