Tuberculosis (TB) can cause a rapid heartbeat. TB is a respiratory infectious disease caused by Mycobacterium tuberculosis, which infects the lungs and can cause a wide range of symptoms, including fever, cough, sputum, night sweats, and weight loss. Symptoms of tuberculosis can vary depending on the severity of the disease. Most cases of tuberculosis, especially those without fever, do not cause an obvious increase in heart rate. However, when fever occurs, especially high fever, due to the increase in body temperature, it can promote the body’s metabolism to speed up, and the body needs to consume more oxygen and energy, thus compensating to cause the heartbeat to speed up in order to promote the blood circulation to speed up, and to provide the body with more oxygen and energy substances. When TB damages the body more seriously and complicates pulmonary heart disease, the load on the heart increases, thus reflexively causing faster breathing and heartbeat. Therefore, when TB causes rapid heartbeat, it needs to be taken seriously and treated actively.