What causes chest tightness and shortness of breath?

Chest tightness and shortness of breath may result from physiological factors or pathological conditions such as bronchitis, coronary heart disease, etc. The specific analysis is as follows:

I. Physiological Factors

If one is at a high altitude where atmospheric pressure is low and air is thin, the body may take in insufficient oxygen, leading to decreased blood oxygen saturation and lower-than-normal oxygen levels in the lungs. Hypoxia may cause chest tightness and increase respiratory rate, resulting in shortness of breath.

II. Pathological Factors

1. Bronchitis

If a patient's lungs are frequently affected by viral infections or if they smoke for prolonged periods, the bronchial clearance capacity may decrease and local mucosal ciliary movement may be impaired, potentially triggering an inflammatory response. This can lead to edema of the bronchial mucosa, impairing normal breathing and causing the aforementioned symptoms. It is recommended that patients use medications such as cefaclor sustained-release tablets, acetylcysteine effervescent tablets, and montelukast sodium chewable tablets under medical guidance.

2. Coronary Atherosclerotic Heart Disease

If a patient frequently consumes foods high in fat or is significantly overweight, excessive cholesterol in the blood may gradually deposit along with other substances on the inner walls of blood vessels, narrowing the vessel lumen. In severe cases, this may lead to thrombosis and trigger coronary atherosclerotic heart disease. This condition can subsequently cause inadequate blood supply to the heart and reduced oxygen levels, resulting in these symptoms. It is recommended that patients take medications such as atorvastatin calcium tablets, nifedipine controlled-release tablets, and nicorandil tablets as prescribed by a physician.

In addition to the above causes, tuberculosis may also be responsible. Patients should avoid strenuous activities during treatment to reduce cardiac load.