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I understand your concern. I have gone through your reports (attachment removed to protect the patient's identity). Although you have mitral valve prolapse, there is no mitral regurgitation. But your chest CT (computed tomography) scan shows mild bronchiectasis, causing the cough and sputum. You should consult a chest physician for a further opinion regarding this. Ideally, you should take an expectorant (cough syrup, which encourages the sputum to come out) and sleep on the side. It will encourage coughing and bring out sputum, and thus prevent infection.
The Probable causes:
The probable cause is post infective.Treatment plan:
Treat the condition by steam inhalation, chest physiotherapy, and expectorants.