Patients who feel a significant left hand pulse may be suffering from tachycardia, such as hyperthyroidism or fever, because for every 1°C increase in body temperature, the corresponding pulse or heart rate will increase by 12 beats/min. Others may also be suffering from cardiac neurosis or disturbances in the regulation of the vegetative nerves, and have a significant self-perceived pulse beat. It is recommended that patients have their actual pulse and heart rate measured to help assess whether a pulse abnormality currently exists. If the patient has a significant self-perceived pulse beat and the pulse is within the normal range, it is highly considered to be related to psychosomatic factors. If the pulse does beat faster, the patient is advised to have an ambulatory electrocardiogram, in addition to routine blood, serum ion and thyroid function checks.