tachycardia

I afterwards had periodical attacks of intermittence but never any tachycardia, at least none that lasted more than a few seconds.

But, as I rose, I suddenly felt acute pain along the sternum; at the same time began a strong crisis of tachycardia.

In tachycardia there is an irritation of the accelerator nerves to the heart, in brachycardia of the inhibitory nerves.

Bradycardia or abnormal slowness of the heart-beat, is the converse of tachycardia.