[Diagnostics in venous thrombosis and pulmonary embolism]

Area of Science:

• Cardiology
• Vascular Medicine
• Diagnostic Imaging

Context:

• Venous thromboembolism (VTE), encompassing deep vein thrombosis (DVT) and pulmonary embolism (PE), presents a significant public health challenge with a prevalence of 1-2/1000 individuals annually.
• The nonspecific nature of VTE signs and symptoms necessitates its consideration in differential diagnoses, although confirmed cases are infrequent (1 in 5-6 suspected).
• Effective management hinges on timely diagnosis and treatment to mitigate acute, life-threatening events and long-term disabling sequelae.

Purpose:

• To outline the diagnostic approach for venous thromboembolism, emphasizing the role of clinical probability assessment and D-Dimer testing.
• To detail current imaging standards for diagnosing deep vein thrombosis (venous ultrasound) and pulmonary embolism (CT pulmonary angiography).
• To highlight persistent diagnostic challenges, particularly in cases of suspected recurrent disease and VTE during pregnancy.

Summary:

• A low clinical probability combined with a negative D-Dimer test can exclude VTE in 40-50% of patients, avoiding further investigations.
• For remaining patients, imaging is essential: venous ultrasound for DVT and CT pulmonary angiography for PE.
• Both ultrasound and CT pulmonary angiography offer high sensitivity and specificity for definitive VTE diagnosis, though challenges persist in specific patient populations.

Impact:

• Facilitates earlier and more accurate diagnosis of venous thromboembolism, leading to prompt initiation of life-saving therapies.
• Reduces unnecessary diagnostic procedures and healthcare costs by effectively ruling out VTE in low-risk individuals.
• Improves patient outcomes by minimizing acute complications and preventing long-term disability associated with untreated or delayed VTE diagnosis.