Sinus tachycardia

Heart rhythm originating from the normal Sinus tissue, but more rapid than normal (more than 100 beats per minute).

Sinus tachycardia can be a physiological response to certain situations, such as exertion, excitement or pregnancy. Sometimes it can indicate a medical problem, such as side effect of a drug, fever, exsiccation, bleeding, anemia, hyperthyroidism and more.