I feel I can't breathe after strenuous exercise. I stop and recover quickly. Is there a time when the heart rate is not abnormal in the early and late stages of heart disease?
Heart disease usually has arrhythmia. Not all heart diseases have arrhythmia, but also myocardial ischemia, palpitation and chest tightness. Lack of exercise and short-term feeling of dyspnea during strenuous exercise are also normal phenomena. If you feel unwell at ordinary times, you can go to the hospital for ECG and color Doppler ultrasound.
If you don't have too much pressure, you'd better stay up at the hospital and have a rest if you don't have too much heart problem
Judging from your symptom description, it should still be related to the lack of exercise at ordinary times. After strenuous exercise, it is easy to lead to the increase of respiratory rate. I suggest you should exercise properly at ordinary times, do not carry out strenuous activities at one time, and go to the hospital for examination regularly. If there is no problem in ECG and color Doppler ultrasound, don't be too nervous.