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Are ectopic beats that come in paterns much more likely to be ventricular?

I'm referring to patterns such as bigeminy, or if they occur in groups such as couplets or triplets.  Most of the articles I found online about "bigeminy" refer only to ventricular bigeminy.  As for couplets and triplets, I was not able to find any reliable articles or websites mentioning "atrial couplets" or "atrial triplets".  The only site I was able to find is a suspicious foreign online doctor site written in broken English.  It seems like atrial ectopic beats are almost always isolated.  Does anybody know if this is indeed true, and if so, what prevents atrial ectopic beats from occurring in pairs, triples or in a bigeminy pattern?  

Also, I am aware that supraventricular tachycardia lasts for at least a couple of minutes, unless terminated by a Valsalva's maneuver or by administration of drugs.  I was not able to find any supraventricular analogue of NSVT.  

Thank you.  
1 Responses
20748650 tn?1521035811
Nah, SVT terminates spontaneously.

Atrial beats can absolutely come in patterns. Though this is more commonly associated with ventricular ectopic patterns.

If you really want to bark up a tree the correct thing to research would be “Tachycardia Mechanisms”; specifically the difference between a “Triggered”, “Reentrant” and “Autonomic” arrhythmia in general.
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