Heart attack chest congestion and tightness at bedtime, EKG ultrasound is normal, what causes this

Heart attack at bedtime, chest congestion and tightness, normal ECG ultrasound may be caused by myocardial ischemia, neurosis and other reasons.
Myocardial ischemia has a certain process, it is recommended to do a 24-hour dynamic electrocardiogram or exercise electrocardiogram to help diagnosis; in addition, pericarditis, myocarditis and other non-ischemic heart disease may also appear in the electrocardiogram is normal, you can draw blood tests to further confirm the diagnosis.
Neurosis such as anxiety, depression, mania, etc., due to psychological factors leading to chest tightness, but there is no organic changes in the body, the electrocardiogram shows normal.
In addition, cervical spondylosis, gastrointestinal diseases, respiratory diseases may appear this symptom, it is recommended to go to a specialized hospital for examination, under the guidance of a professional doctor for treatment, do not take medication without authorization.