Pulmonary Embolism in Patients With Acute Heart Failure (PEHF Study)

Inclusion Criteria: * Adult patient (≥18 years) * Admission to the emergency department or cardiology unit of a participating center * Recent onset or worsening dyspnea and/or orthopnea * Diagnosis of acute heart failure defined by recent dyspnea associated with at least one of the following: * Bilateral pulmonary crackles on auscultation and/or peripheral edema * Signs of pulmonary congestion on chest X-ray or lung/cardiac ultrasound * Elevated natriuretic peptide levels (BNP or NT-proBNP) * Documented history of heart failure (known chronic heart failure or prior hospitalization for acute heart failure) * Patient affiliated with or beneficiary of a social security system * Patient able and willing to provide free, informed, and written consent Exclusion Criteria: * Shock state suggesting cardiogenic shock and/or severe pulmonary embolism * Severe respiratory distress at inclusion preventing appropriate positioning or performance of imaging examinations * Evidence of acute coronary syndrome on electrocardiogram at admission * Severe renal impairment (creatinine clearance \<30 mL/min) * Known hypersensitivity or allergy to iodinated contrast agents * Ongoing therapeutic anticoagulation for more than 48 hours prior to admission * Hospitalization for more than 48 hours prior to inclusion * Inability to ensure 90-day follow-up (e.g., end-of-life situation, no fixed address, patient not reachable) * Inadequate understanding of the French language preventing proper study information and consent * Pregnant, breastfeeding, or postpartum women * Individuals under legal protection or other vulnerable populations, including minors and protected adults, in accordance with applicable public health regulations (Articles L.1121-5 to L.1121-8 and L.1122-1-2 of the French Public Health Code)