Rapid heart rate, more than 100 beats per minute.

Accelerated heart rate can be a normal physiologic reaction of the body to physical strain or excitement. In these situations, the origin of the heart beats is from the natural and normal pacemaker, the Sinus node.

In some instances, the accelerated heart rate is due to a rapid rhythm disturbance and in these situations the rhythm originates from tissues outside the sinus located in other points of the heart.

The clinical manifestation and the therapeutic approach depend on the rapidity and the duration of the disorder, on the basic state of the heart as well as on the specific type of the disorder.