Inclusion Criteria

• Male patients aged 30-75 years

• Undergoing successful percutaneous coronary intervention (PCI) for one of the following:

  • Acute myocardial infarction (Group 1)
  • Stable angina (Group 2)

• Hemodynamically stable after the PCI procedure

• Survival of the index hospitalization

• Ability to provide written informed consent

• Sexually active within the 3 months prior to enrollment

• Willingness and ability to complete follow-up visits and questionnaires at:

  • Baseline (post-PCI recovery)
  • 3 months
  • 6 months Exclusion Criteria

• Known malignancy (active or recently treated)

• Neurological disorders affecting erectile function, including:

  • Spinal cord injury
  • Multiple sclerosis
  • Parkinson's disease

• Uncontrolled diabetes mellitus (HbA1c > 9%)

• Presence of more than two chronic systemic diseases, such as:

  • Severe renal disease
  • Severe hepatic disease
  • Severe pulmonary disease

• Polypharmacy, defined as chronic use of more than three daily medications

• Absence of sexual activity or lack of a sexual partner

• Refusal or inability to provide informed consent or complete study questionnaires

• Severe psychiatric illness interfering with study participation

• Endocrine disorders, including:

  • Untreated hypogonadism
  • Thyroid disease

• Major post-PCI complications preventing participation, including:

  • Reinfarction
  • Stroke
  • Heart failure