Sinus Tachycardia

What is it?

Sinus tachycardia is a normal increase in heart rate that happens with fever, excitement, and exercise. There is no need for treatment, except in cases when it is caused by an underlying problem, such as anemia (a low blood count) or hyperthyroidism (overactive thyroid gland), or happens frequently and without a clear cause (inappropriate sinus tachycardia).

Source: Heart Rhythm Society

What are some symptoms?

Palpitations, shortness of breath
Dizziness/lightheadedness, chest pain or chest pressure
Heart palpitations (feeling like your heart is racing, pounding, or fluttering)
Pulse that is faster than normal or changing between fast and slow

Source: Heart Rhythm Society