Table 1 Inclusion and Exclusion Criteria

1. Male or female ages 60 years or above.

2. Diagnosis of chronic coronary syndrome (include past exertional angina, ischemic cardiomyopathy, stable phase after acute coronary syndrome, variant angina and microvascular angina) [13].

3. NYHA functional classification class I or II at admission.

4. All participants provided written, informed consent before taking part in the study.

1.severe psychiatric or neurological disorder. and communication problems due to language difficulties.

2.completely disabled or could not cooperate or agree with the study.

3. severe conditions, including generalized inflammation or end-stage malignant disease.