This study aimsto compare short-termclinical outcomesand one-year recurrence rates in patients with acute pulmonary embolism with versus without sleep-disordered breathing, recruited from Alexandria MainUniversityHospital.

This prospective observational study will include consecutive adult patients admitted to the Chest Diseases Department and related units at Alexandria Main University Hospital (AMUH) with a diagnosis of acute pulmonary embolism confirmed by CT pulmonary angiography and followed up with sllep study to asses the effect of sleep related breathing disorderon the recurrence of emboli.

Inclusion Criteria:

• Age≥18years.

  • Objectively confirmed acute pulmonary embolism by computed tomography pulmonary angiography (CTPA).
  • Hemodynamically stable or clinically stabilized within 72 hours of admission. .Ability to provide informed consent.

Exclusion Criteria:

.Known central sleep apnea without obstructive features. .Inabilityto undergo sleep study evaluation.

• Pregnancy

adult patients more than 18 years diagnosed with pulmonary embolism managed and followed up at the chest diseases department

refusal by the department