Frequency of venous thromboembolism risk factors in hospitalized patients with pulmonary embolism in routine Russian practice

Type of funding sources: Public hospital(s). Main funding source(s): Ryazan State Medical University

Despite advances in the diagnosis and treatment of Pulmonary Embolism (PE), it remains one of the most common causes of death among cardiovascular diseases.

Purpose. To study the prevalence of the Venous Thromboembolism (VTE) risk factors (RFs) among patients with PE in the typical Regional Vascular Centers in Russia.

Materials and Methods. The study was conducted within the framework of the Russian SIRENA Register. А retro- and prospective analysis of the clinical cases (n = 107, median age 63 (52-74) years, 39.3% of men) of PE treated at the Regional Vascular Centers from 01 May 2018 to 31 May 2019 (13 months) was performed.

Results. It was revealed that 72.9% of patients had multiple RFs. The average number of strong RFs per PE patient is 1.1, moderate RFs – also 1.1, weak RFs - 2.4. Strong (± moderate and weak) RFs were registered in 26.2% of patients. The most common strong RFs is a history of VTE (22.4% of the PE cohort). Moderate (± low) RFs were observed in 31.8% of PE cases. The most common moderate RFs is malignant neoplasms (17.8%, n = 19; 7 out of 19 had metastases, 5 out of 19 received chemotherapy). In the 40.2% of patients, only weak RFs were identified. The most prevalent were arterial hypertension (70.1%), old age (59.8%) and obesity (46.7%). As a result, 6.5% of PE patients did not have any RFs, and 67.3% of PE patients did not have reversible RFs.

Сonclusion. A high frequency and multiple character of VTE RFs were registered in PE patients in routine clinical practice. The greatest frequency is common cardiovascular RFs, which allows to consider VTE as part of the cardiovascular continuum. In a small number of  PE patients, no known VTE RFs were detected, which determines the need to study other possible conditions that contribute to the PE development. Two-thirds of patients do not have reversible VTE RFs, which leads to the need for active anticoagulant prevention of PE in these patients.