Short-onset atrial precontractions are atrial impulses that occur more than three times in a row, but they are short-lived and return to sinus rhythm within a short period of time, i.e., frequent short-onset. It is recommended to see a specialist at the hospital to check if there is any underlying cause. The common cause is hyperthyroidism, but it can also be seen in others, such as hypertensive heart disease, coronary heart disease, and pulmonary heart disease. If you have these underlying diseases, treat them accordingly.