The weather is too high in summer, and I feel breathless and have difficulty breathing. I can only turn on the fan or air conditioner at home, as soon as I go out.

Condition analysis: Your symptoms of shortness of breath and dyspnea need to be highly considered whether it is a problem of decreased cardiac function, and actively carry out cardiac color Doppler examination to clarify the structure and functional state of the heart, combined with the history of dilated cardiomyopathy or previous myocarditis. Suggestion: Note that myocarditis cannot be diagnosed by ECG. Myocarditis requires a clear history of infection, and then chest tightness and chest pain occur, and myocardial enzymes are significantly increased. Don't diagnose blindly. It is recommended to see a cardiologist in time and wish you good health.