An increased risk of venous thromboembolism (VTE) in patients with COVID-19 pneumonia admitted to intensive care unit (ICU) has been reported. Whether COVID-19 increases the risk of VTE in non-ICU wards remains unknown. We aimed to evaluate the burden of asymptomatic deep vein thrombosis (DVT) in COVID-19 patients with elevated D-dimer levels. Method: In this prospective study consecutive patients hospitalized in non-intensive care units with diagnosis of COVID-19 pneumonia and D-dimer > 1000 ng/ml were screened for asymptomatic DVT with complete compression doppler ultrasound (CCUS). The study was approved by the Institutional Ethics Committee. Results: The study comprised 156 patients (65.4% male). All but three patients received standard doses of thromboprophylaxis. Median days of hospitalization until CCUS was 9 (IQR 5-17). CCUS was positive for DVT in 23 patients (14.7%), of whom only one was proximal DVT. Seven patients (4.5%) had bilateral distal DVT. Patients with DVT had higher median D-dimer levels: 4527 (IQR 1925-9144) ng/ml vs 2050 (IQR 1428-3235) ng/ml; p < 0.001. D-dimer levels > 1570 ng/ml were associated with asymptomatic DVT (OR 9.1; CI 95% 1.1-70.1). D-dimer showed an acceptable discriminative capacity (area under the ROC curve 0.72, 95% CI 0.61-0.84). Conclusion:In patients admitted with COVID-19 pneumonia and elevated D-dimer levels, the incidence of asymptomatic DVT is similar to that described in other series. Higher cut-off levels for D-dimer might be necessary for the diagnosis of DVT in COVID-19 patients. The aim of our study was to evaluate the burden of asymptomatic

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Background: Floating right heart thrombi (RHT) are in transit from the legs to the pulmonary arteries and thus are a severe form of venous thromboembolism (VTE), with a high early mortality rate without treatment. There is a lack of evidence-based recommendations for its management. The objective of this study is to describe our experience in the surgical management of thrombus-in-transit and pulmonary embolism (PE) in a tertiary hospital. Methods: We recruited four patients with thrombus-in-transit and PE treated with early surgical embolectomy and anticoagulation. Epidemiologic, laboratory, imaging and clinical data of the thromboembolic episode and the subsequent course were collected. Results: The sample included 3 males and 1 female, with a mean age of 49.7. The most frequent initial symptoms were dyspnea, syncope, chest pain and signs of deep vein thrombosis (DVT). Transthoracic echocardiogram (TTE) found the thrombus-in-transit in all the cases. The inicial treatment was unfractionated heparin (UFH) and urgent right atriectomy and manual removal of the thrombi. Three patients needed perioperative infusion of vasopressor drugs. All patients had right heart dysfunction at the time of diagnosis. The mean scoring in the Pulmonary Embolism Severity Index (PESI) was 90. All patients survived after 30 days of follow-up. Conclusions: Early surgical embolectomy of thrombus-in-transit is an effective option of management in selected patients, although the current evidence to support this approach is not definitive.

Background: There is limited evidence on the etiology and outcomes of renal infarction. A provoking factor is identified only in one- to two-thirds of patients. Methods: This is a retrospective observational study. The clinical characteristics and outcomes of patients with acute renal infarction were studied; the sample was divided into two groups according to the presence of at least one provoking factor at the time of diagnosis (atrial fibrillation, flutter, major thrombophilia, or renal artery malformations). Results: The study comprised 59 patients with a mean age of 63 (±16.7) years and a follow-up period of 3.1 (±2.8) years. An identifiable provoking factor was found for 59.3% of the renal infarctions at the time of diagnosis, and atrial fibrillation was the most frequent one (in 49.2% of all patients). Renal impairment was found in 49.2% of the patients at diagnosis and in 50.8% of the patients 6 months after the event (p = 0.525). When compared with the idiopathic group, the patients with provoked infarction were older (69.8 vs. 57.9 years, p = 0.014) and had a higher rate of recurrence of arterial thrombosis during follow-up (18.8 vs. 0%, p = 0.028), but there were no differences in the rest of the baseline characteristics or in mortality rates. Six patients (10.2%) in the idiopathic group were diagnosed with atrial fibrillation during follow-up. Conclusions: Atrial fibrillation, both at diagnosis and at follow-up, is the most common identifiable cause of renal infarction; however, a significant number of patients are idiopathic, and these are younger, but they have a similar burden of cardiovascular disease and a lower risk of arterial recurrence.