Is it a disease when a child lets out a long breath?

Patient's question:

Age in years
Detailed medical history and purpose of consultation: The child frequently sighs and has been doing so for two or three months. Is this considered a disease and how should it be treated?
Duration and onset of the current illness: 3 months
Current general condition: Often

Doctor's answer:

The child's sighing (deep exhalation) is a sign of myocardial damage or myocarditis. Treatment primarily focuses on nourishing the heart muscle and improving cardiac function. In traditional Chinese medicine terms, this is known as "strengthening qi and nourishing the heart." Common formulas include Shengmai San, Bao Yuan Tang, Zhi Gan Cao Tang, Shen Lian Zheng Xin Pian, etc. Western medications such as vitamin C, coenzyme Q10, and fructose can also be used.
Daily care should include: consuming more vegetables and fruits like tomatoes, grapes, and jujubes to increase vitamin intake; ensuring adequate rest, avoiding strenuous activities, and avoiding overeating or intense exercise to reduce cardiac burden. The above suggestions are for reference only. Specific measures should be reviewed at the hospital, and a doctor should determine the appropriate course of action.