Inappropriate Sinus Tachycardia Strike Women as Young as 20-plus!
Inappropriate sinus tachycardia, technically in the category of supraventricular tachycardia is not a very common type of cardiac arrhythmia. Though it is very difficult to fully explicate the mechanism and etiology of inappropriate sinus tachycardia, it can be described as a condition where a person’s heart beat is quite high. The heart rate of the person is bound to rise rapidly with a bit of exertion and is accompanied by fatigue, exercise intolerance and palpitations.
    
Inappropriate sinus tachycardia is not associated with an abnormal electrical pattern on the ECG and rather primarily occurs from within the cardiac structure that produces the standard heart pulse.

People from all age groups may generally suffer from inappropriate sinus tachycardia; however, it is most common among the young women in their 20s and 30s. Apart from some of the prominent symptoms like fatigue, exercise intolerance and palpitations, there are other symptoms like blurred vision, occasional paresthesia, diarrhea, cramping in wrists, breathing, dizziness, and shortness of breath as well and others.
 
People suffering from sinus tachycardia have heart rate of more than 100 beats per minute in rest and it rises up to 140-150 beats per minute with little exertion. As it is a recent phenomenon, most physicians dismiss it as a mere psychological condition making it difficult to determine the causes so that proper treatment can be meted out. As a result, people are not aware of its exact causes and hence no proper diagnosis can be determined. Though it is taken as a primary disorder of the sinus mode; sinus mode itself has structural changes. It is also proved that dysautonomia, general derangement of the autonomic nervous system can be found in patients suffering from inappropriate sinus tachycardia.
 
As no formal diagnostic criteria exists, proper diagnosis of inappropriate sinus tachycardia is that exclusion i.e. exclusion of all other causes of sinus tachycardia, exclusion of common forms of supraventricular tachycardia and others such as normal P wave morphology, nocturnal dip in heart rate, inappropriate heart rate response on exertion etc.
 
Inappropriate sinus tachycardia has been treated in the form of pharmacological therapy or catheter ablation with results being both success and failure. Though it is difficult to treat Inappropriate Sinus Tachycardia successfully, medications used include beta blockers, calcium channel blockers and antiarrhythmic agents. Invasive treatments in the forms of complete sinus mode ablation, sinus mode modification etc. are also used to treat inappropriate sinus tachycardia.

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