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INTRODUCTION: Racial and ethnic differences in pulmonary embolism (PE) mortality within rural and urban regions in the U.S. have not previously been described. PE mortality may vary across regions and urbanization given disparities in social and structural determinants and comorbid disease. METHODS: Using surveillance data from the Centers for Disease Control and Prevention, age-adjusted mortality rates (AAMR) related to PE were calculated for rural and urban regions in the U.S., in non-Hispanic Black and White women and men, between 1999 and 2020. RESULTS: Among 137,946 deaths in urban regions and 41,333 deaths in rural regions due to PE during this period, AAMR decreased 1.8% per year in urban regions from 3.1 to 100,000 in 1999 to 2.2 per 100,000 in 2020, and decreased 1% per year in rural regions from 4.3 to 100,000 in 1999 to 3.3 per 100,000 in 2020. Since 2008, AAMR from PE increased in non-Hispanic White males in rural and urban regions, decreased in non-Hispanic Black females in rural regions, and otherwise remained stagnant in all other race-sex groups. CONCLUSIONS: AAMR from PE was higher in rural compared with urban individuals, with differences by race and sex. Mortality rates remained stagnant over the last decade in non-Hispanic Black adults and non-Hispanic White females and increased in non-Hispanic White males.
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Embolia Pulmonar , Factores Raciales , Factores Sexuales , Adulto , Femenino , Humanos , Masculino , Etnicidad , Población Rural , Estados Unidos/epidemiología , Grupos Raciales , Población Urbana , Embolia Pulmonar/mortalidadRESUMEN
A 62-year-old received orthotopic liver transplantation. Three weeks later, thrombotic microangiopathy developed. Testing revealed thrombotic thrombocytopenic purpura (TTP) characterized by low ADAMTS13 (A Disintegrin-like Metallopeptidase with ThromboSpondin type 1 motif 13) activity and no inhibitor of ADAMTS13 protein. Retrospective attainment of donor records revealed a TTP diagnosis, presumably hereditary TTP (hTTP), as an ADAMTS13 protein inhibitor was not mentioned. As the grafted liver does not produce ADAMTS13 protein, the recipient now functionally has hTTP and will likely need plasma transfusions indefinitely. While hTTP is extremely rare, it should be considered a contraindication to liver donation outside of exceptional circumstances. If a potential liver donor has TTP listed on medical history, attempts should be made to determine whether it is autoimmune or hereditary. An accurate medical history is critical as it is the only reliable way to identify hTTP, as outside of acute exacerbations of TTP, donors with hTTP can have normal laboratory values, including normal hemoglobin, platelets, and renal function.
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Trasplante de Hígado , Púrpura Trombocitopénica Trombótica , Microangiopatías Trombóticas , Humanos , Persona de Mediana Edad , Púrpura Trombocitopénica Trombótica/diagnóstico , Proteína ADAMTS13 , Estudios RetrospectivosRESUMEN
Thrombotic thrombocytopenic purpura (TTP) is not uncommonly seen in pregnancy, either with the first episode or with the exacerbation of known disease. The management of TTP in pregnancy can be challenging if there is refractoriness to the use of therapeutic plasma exchange (TPE) and high-dose corticosteroids. Caplacizumab, a vWF-directed humanized antibody fragment, is approved for the treatment of acquired TTP but there is sparse data on its use in pregnant patients. Antenatal and peripartum haemorrhage is a theoretical concern with the use of the medication in the obstetric population. However, as options for treatment of TTP in the patients who have refractory disease are significantly limited, off-label use of caplacizumab to achieve disease control and prevent maternofetal morbidity and mortality is a reasonable consideration. This article described the successful use of caplacizumab in a pregnant patient with acquired TTP and the associated favourable outcome. The patient suffered an exacerbation following initial TPE and became refractory to both plasma exchange and high-dose corticosteroids. Off-label use of caplacizumab resulted in hematologic recovery and successful delivery of a healthy neonate. This case represents a contribution to the sparse literature on the use of this effective medication in an often-challenging clinical situation.
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Púrpura Trombocitopénica Trombótica , Embarazo , Recién Nacido , Humanos , Femenino , Púrpura Trombocitopénica Trombótica/tratamiento farmacológico , Hemorragia/terapia , Intercambio Plasmático , Corticoesteroides/uso terapéutico , Proteína ADAMTS13RESUMEN
The effectiveness and safety of direct oral anticoagulants (DOAC) compared with warfarin remains uncertain in obese patients. We assessed the comparative effectiveness and safety of DOACs with warfarin for the treatment of VTE among obese patients. This multi-center retrospective cohort study included adults with a BMI ≥ 35 kg/m2 or weight ≥ 120 kg prescribed either DOAC (apixaban, dabigatran, edoxaban, rivaroxaban) or warfarin for a VTE diagnosis. The primary outcome was the 12-month rate of recurrent VTE. The secondary outcome was the 12-month rate of major bleeding. Among 5626 patients, 67% were prescribed warfarin and 33% were prescribed a DOAC. The 12-month VTE recurrence rate was 3.6% (67/1823) for patients treated with DOAC compared with 3.8% (143/3664) for patients treated with warfarin [odds ratio for recurrent VTE on warfarin versus DOAC (OR) (95% CI).07 (0.80, 1.45)]. The 12-month major bleeding rate was 0.5% (10/1868) for patients on DOAC versus 2.4% (89/3758) on warfarin [OR 4.25 (2.19, 8.22)]. Similar proportions of recurrent VTE occurred across BMI thresholds on DOAC and warfarin: for BMI ≥ 35 kg/m2 (N = 5412), 3.6% versus 3.8%, respectively [OR 1.08 (0.80, 1.46)]; for BMI ≥ 40 kg/m2 (N = 2321), 4.4% versus 3.5%, respectively [OR 0.80 (0.51, 1.26)]; and for BMI ≥ 50 kg/m2 (N = 560), 3.1% versus 3.7%, respectively [OR 1.18 (0.39, 3.56)]. Similar proportions of recurrent VTE occurred in patients with obesity treated for VTE with DOACs and warfarin. DOACs were associated with lower major bleeding compared to warfarin in patients with obesity and VTE.
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Tromboembolia Venosa , Warfarina , Adulto , Humanos , Warfarina/efectos adversos , Anticoagulantes/efectos adversos , Tromboembolia Venosa/etiología , Tromboembolia Venosa/inducido químicamente , Estudios Retrospectivos , Rivaroxabán/efectos adversos , Hemorragia/inducido químicamente , Hemorragia/tratamiento farmacológico , Obesidad/complicaciones , Obesidad/tratamiento farmacológico , Administración OralAsunto(s)
Negro o Afroamericano , Disparidades en el Estado de Salud , Disparidades en Atención de Salud/etnología , Disparidades en Atención de Salud/tendencias , Admisión del Paciente/tendencias , Embolia Pulmonar/etnología , Población Blanca , Adulto , Distribución por Edad , Factores de Edad , Anciano , Anciano de 80 o más Años , Bases de Datos Factuales , Femenino , Humanos , Illinois/epidemiología , Masculino , Persona de Mediana Edad , Embolia Pulmonar/diagnóstico , Embolia Pulmonar/terapia , Factores Raciales , Factores de Riesgo , Factores Sexuales , Factores de TiempoRESUMEN
Background: For ambulatory cancer patients receiving systemic chemotherapy, adherence is low to recommended venous thromboembolism (VTE) prevention interventions. Previously, we identified implementation strategies to address barriers to adherence, including (1) conducting clinician education and training; (2) developing and distributing educational materials for clinicians; (3) adapting electronic health records to provide interactive assistance; and (4) developing and distributing educational materials for patients. The objective of this study was to develop these implementation strategies' form (i.e., how and when) and content (i.e., information conveyed) as a critical step for implementation and dissemination. Methods: To design and develop the form and content of the implementation strategies, we conducted multidisciplinary stakeholder panels with oncology clinicians, pharmacists, and hematologists. Over several panel discussions, we developed a low fidelity prototype. Participants performed preliminary usability testing, simulating patient care encounters. We also conducted interviews with three patients who provided additional feedback. Results: The form and content for each strategy, respectively, included (1) concise training with a slide deck; (2) succinct summary of evidence for the interventions and support for anticoagulation management; (3) automated VTE risk-assessment and clinical decision support, including bleeding risk assessment and anticoagulation options; and (4) patient education resources. During development, audit and feedback was identified as an additional strategy, for which we created report cards to implement. Conclusion: With stakeholder input, we successfully developed the form and content needed to put the implementation strategies into practice. The next step is to study the effect on the uptake of ambulatory VTE prevention recommendations in oncology clinics.
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For most patients, direct oral anticoagulants (DOACs) are preferred over vitamin K antagonists for stroke prevention in atrial fibrillation and for venous thromboembolism treatment. However, randomized controlled trials suggest that DOACs may not be as efficacious or as safe as the current standard of care in conditions such as mechanical heart valves, thrombotic antiphospholipid syndrome, and atrial fibrillation associated with rheumatic heart disease. DOACs do not provide a net benefit in conditions such as embolic stroke of undetermined source. Their efficacy is uncertain for conditions such as left ventricular thrombus, catheter-associated deep vein thrombosis, cerebral venous sinus thrombosis, and for patients with atrial fibrillation or venous thrombosis who have end-stage renal disease. This paper provides an evidence-based review of randomized controlled trials on DOACs, detailing when they have demonstrated efficacy and safety, when DOACs should not be the standard of care, where their safety and efficacy are uncertain, and areas requiring further research.
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Fibrilación Atrial , Trombosis , Tromboembolia Venosa , Trombosis de la Vena , Humanos , Administración Oral , Anticoagulantes/uso terapéutico , Fibrilación Atrial/complicaciones , Fibrilación Atrial/tratamiento farmacológico , Trombosis/tratamiento farmacológico , Tromboembolia Venosa/tratamiento farmacológico , Trombosis de la Vena/tratamiento farmacológico , Vitamina K , Ensayos Clínicos Controlados Aleatorios como AsuntoRESUMEN
BACKGROUND: Heparin-induced thrombocytopenia (HIT) is an immune-mediated drug reaction that can cause thromboembolism in the setting of thrombocytopenia. An enzyme-linked immunosorbent assay (ELISA)-based assay to screen for HIT antibodies (HAb) is available but has relatively low specificity and a correspondingly high false positive rate. The 4Ts score has been validated to determine the pretest probability of HIT. The authors hypothesized that an electronic health record (EHR)-based clinical decision support (CDS) tool incorporating the 4Ts score would reduce the volume of HAb orders. METHODS: After implementing a CDS tool into the EHR, the researchers retrospectively evaluated the impact from November 2019 to October 2021, compared to a preintervention period (January to October 2019). The primary outcome was average tests per month. Secondary outcomes included rates of tests ordered per total inpatient encounters and proportion of HAb sent despite low 4Ts score in the postintervention study period. RESULTS: Of 1,833 HAb sent during the study period, 1,217 occurred in the postintervention period. In the postintervention period compared with the preintervention period, the average orders per month was 50.5 (standard deviation [SD] 9.7) vs. 61.6 (SD 7.2) (pâ¯=â¯0.003), and the order incidence rate was 8.0 per 1,000 patient encounters postintervention vs. 9.2 per 1,000 patient encounters preintervention (rate ratio [RR] 0.87, 95% confidence interval [CI] 0.79-0.96, pâ¯=â¯0.002). Postintervention, 252 (20.7%) had a 4Ts score calculated as low probability, 759 (62.4%) as intermediate probability, and 131 (10.8%) as high probability, and 75 had no associated 4Ts score. CONCLUSION: Implementation of a simple CDS tool reduced the rate of HAb orders, reducing unnecessary HAb testing.
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Heparina , Trombocitopenia , Humanos , Heparina/efectos adversos , Registros Electrónicos de Salud , Estudios Retrospectivos , Trombocitopenia/inducido químicamente , Trombocitopenia/diagnóstico , Ensayo de Inmunoadsorción Enzimática , Anticoagulantes/efectos adversosRESUMEN
Background: Evidenced-based interventions have been developed to prevent venous thromboembolism (VTE) in ambulatory patients with cancer, including VTE-risk assessment for all patients and targeted primary thromboprophylaxis for high-risk patients. Despite supportive evidence and recommendations, oncologists rarely assess VTE risk or provide primary prophylaxis. Our previous work identified barriers and facilitators to using VTE prevention interventions in oncology practice. Objectives: To identify potential strategies that address the identified barriers and leverage facilitators to achieve successful implementation of evidence-based interventions for VTE prevention in oncology practice. Methods: We used the Implementation Research Logic Model, an implementation science framework, to map the relationships among barriers and facilitators, feasible and effective implementation strategies, and implementation and clinical outcomes that will be used to evaluate the implementation strategies. Results: We identified 12 discrete implementation strategies (eg, conducting clinician education and training and staged implementation scale-up) that address barriers and leverage facilitators through their mechanisms of action (eg, increased clinician awareness of evidence and targeting the highest effectiveness). We identified key implementation (eg, penetration, adoption, acceptability, fidelity, appropriateness, and sustainability), system (eg, integration of VTE-risk assessment into clinical workflow), and clinical (eg, lower VTE rates) outcomes targeted by the selected strategies. Conclusion: Using the Implementation Research Logic Model framework and building on our knowledge of barriers and facilitators, we identified implementation strategies and important outcomes to evaluate these strategies. We will use these results to test and measure the strategies to improve the uptake of evidence-based recommendations for VTE prevention in oncology practice.
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The direct anticoagulants (DOACs), apixaban and rivaroxaban, are used for extended-phase treatment of venous thromboembolism (VTE) and have labeling for dose reduction for this indication. The objective of this study was to better understand primary care clinician prescribing patterns of apixaban and rivaroxaban for extended-phase anticoagulation. We conducted a 21-question survey targeting members of the American College of Physicians and United States Veterans Administration anticoagulation management services. Survey questions covered prescribing behaviors for dose reduction of apixaban and rivaroxaban for extended VTE treatment, as well as questions related to the respondent's practice setting. We used logistic regression to assess associations between demographics and prescribing behaviors. We used k-means clustering to identify distinct groups of prescribing patterns. Among 227 respondents, most were attending physicians (60%) and one-third (34%) practiced in internal medicine or primary care. Most (59%) indicated they dose-reduced DOACs. Hospitalists (no outpatient care) were least likely to dose-reduce (OR 0.09 [95% CI 0.03-0.22]), as well as early-career clinicians (0.53 [0.30-0.91]). Pharmacists and clinicians who treat over 500 VTE patients annually were most likely to dose reduce (6.4 [2.9-16.3]), (2.9 [1.5-6.0]), respectively. We identified five clusters of dosing behaviors and characterized clinician makeup. Clusters were primarily differentiated by frequency of dose reduction, DOAC preference, and temporary re-escalation of doses. We identified clinician characteristics that are associated with dose-reduction prescribing behaviors; these analyses provide insight into where targeted interventions, such as protocolization and education, would be most beneficial.
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Background: The direct oral anticoagulants (DOACs), apixaban and rivaroxaban, have been studied for extended-phase treatment of venous thromboembolism (VTE). Yet, scant evidence exists surrounding clinician practice and decision-making regarding dose reduction. Aims: Report clinician practice and characteristics surrounding dose reduction of DOACs for extended-phase VTE treatment. Methods: We conducted a 16-question REDCap survey between July 14, 2021, and September 13, 2021, among ISTH 2021 Congress attendees and on Twitter. We explored factors associated with dose reduction using logistic regression. We used k-means clustering to identify distinct groups of dose-reduction decision-making. Random forest analysis explored demographics with respect to identified groups. Results: Among 171 respondents, most were attending academic physicians from North America. Clinicians who treated larger volumes of patients had higher odds of dose reduction. We identified five clusters that showed distinct patterns of behavior regarding dose reduction. Cluster 1 rarely dose reduces and likely prescribes rivaroxaban over apixaban; cluster 2 dose reduces frequently, does not consider age when dose-reducing, is least likely to temporarily reescalate dosing, and prescribes apixaban and rivaroxaban equally; cluster 3 dose reduces <50% of the time, and temporarily reescalates dosing during increased VTE risk; cluster 4 dose reduces frequently, temporarily reescalates dosing, and is most likely to prescribe apixaban over rivaroxaban; and cluster 5 dose reduces most frequently, and takes the fewest risk factors into consideration when deciding to dose reduce. Conclusions: Most clinicians elect to dose-reduce DOACs for extended-phase anticoagulation. The likelihood of a clinician to dose reduce increases with volume of patients treated. Clinician prescribing patterns cluster around VTE risk factors as well as reescalation during high-risk periods.
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Chronic thromboembolic pulmonary hypertension (CTEPH) is a rare complication in pulmonary embolism (PE) survivors, characterized by chronic vascular occlusion and pulmonary hypertension. The identification and diagnosis of CTEPH requires a stepwise approach, starting with symptom evaluation, functional evaluation, screening imaging, and progressing to interventional hemodynamic assessment. On the backbone of anticoagulation, CTEPH management necessitates a multidisciplinary approach. Surgical pulmonary thromboendarterectomy (PTE) is the only potentially curative option. In nonoperable disease or residual disease after PTE, interventional balloon pulmonary angioplasty and/or pulmonary-vasodilator therapies can be offered, in collaboration with interventional and vascular pulmonary colleagues. As it is a disease that can cause high morbidity and mortality, CTEPH requires a high index of suspicion to diagnose and treat in patients following PE.
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Anticoagulantes/uso terapéutico , Hipertensión Pulmonar/complicaciones , Hipertensión Pulmonar/terapia , Embolia Pulmonar/complicaciones , Embolia Pulmonar/terapia , Angioplastia de Balón , Enfermedad Crónica , Manejo de la Enfermedad , Endarterectomía , Humanos , Hipertensión Pulmonar/diagnóstico , Hipertensión Pulmonar/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Embolia Pulmonar/diagnóstico , Embolia Pulmonar/tratamiento farmacológicoRESUMEN
Although direct-acting oral anticoagulants (DOACs) have widespread first-line use for treatment and prevention of venous thromboembolism (VTE), uncertainty remains regarding their efficacy and safety in patients with obesity. We reviewed available data for use of DOACs for VTE treatment and prevention in patients with obesity, including phase 3, phase 4, meta-analyses, and pharmacokinetic and pharmacodynamics studies. In addition, we reviewed available data regarding DOACs in bariatric surgery. We provide updated guidance recommendations on using DOACs in patients with obesity for treatment and prevention of VTE, as well as following bariatric surgery.
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Tromboembolia Venosa , Administración Oral , Anticoagulantes/efectos adversos , Comunicación , Humanos , Obesidad/complicaciones , Obesidad/tratamiento farmacológico , Tromboembolia Venosa/diagnóstico , Tromboembolia Venosa/tratamiento farmacológico , Tromboembolia Venosa/prevención & controlRESUMEN
OBJECTIVES: To examine the prescribing patterns and outcomes of antithrombotic regimens after venous stent placement. METHODS: A total of 87 patients who received inferior vena cava or iliofemoral venous stents were included in the study. A retrospective review was performed to determine the antithrombotic regimens and the subsequent rates of in-stent restenosis, stent thrombosis, and bleeding. RESULTS: The prescribing patterns of specific antithrombotic regimens were highly variable. In-stent restenosis and stent thrombosis events were observed in 13 of 63 patients (21%) with available follow-up imaging, while major bleeding events were noted in 6 of 87 patients (7%). Triple therapy appeared to reduce the odds of in-stent restenosis/ stent thrombosis when compared to dual antiplatelet therapy (OR = 0.07, P = 0.01). CONCLUSIONS: Substantial variability exists in antithrombotic therapy following venous stenting at our institution. This study demonstrated a reduction of in-stent restenosis/thrombosis events when utilizing triple therapy compared to antiplatelet-only regimens. However, larger prospective trials are needed to more accurately determine the relative risks and benefits of each antithrombotic regimen.
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Fibrinolíticos/farmacología , Stents , Trombosis de la Vena/tratamiento farmacológico , Adulto , Anciano , Constricción Patológica , Femenino , Hemorragia , Humanos , Vena Ilíaca , Masculino , Persona de Mediana Edad , Inhibidores de Agregación Plaquetaria/farmacología , Estudios Retrospectivos , Tomografía Computarizada por Rayos X , Vena Cava Inferior/fisiopatología , Adulto JovenRESUMEN
BACKGROUND: Venous thromboembolism (VTE) is a leading cause of morbidity and mortality in patients with cancer. Expert consensus recommends a risk-based approach to guide prophylactic anticoagulation to prevent VTE in ambulatory patients with cancer receiving chemotherapy. However, oncology practice patterns for VTE prevention remain unclear. PATIENTS/METHODS: We conducted (i) a retrospective, single-center cohort study of patients with pancreatic and gastric cancers to examine rates of prophylactic anticoagulation prescription for eligible patients at high risk of VTE based on the validated Khorana score, and (ii) a 15-question survey of oncology clinicians at the same institution to assess current practice patterns and knowledge regarding VTE risk assessment and primary thromboprophylaxis in February 2020. RESULTS: Of 437 patients who met study criteria, 181 (41%) had a score of ≥ 3 (high-risk), and none had an anticoagulation prescription for prophylaxis without an alternate treatment indication. In a survey sent to 98 oncology clinicians, of which 34 participated, 67% were unfamiliar with the Khorana score or guideline recommendations regarding risk-based VTE prophylaxis, and 90% "never" or "rarely" used VTE risk assessment. CONCLUSIONS: Despite available evidence and existing guideline recommendations for VTE risk assessment for ambulatory patients with cancer, and primary prophylaxis for high-risk patients, this study demonstrates that there is limited uptake in clinical practice.
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Background Although historical trends before 1998 demonstrated improvements in mortality caused by pulmonary embolism (PE), contemporary estimates of mortality trends are unknown. Therefore, our objective is to describe trends in death rates caused by PE in the United States, overall and by sex-race, regional, and age subgroups. Methods and Results We used nationwide death certificate data from Centers for Disease Control and Prevention Wide-Ranging Online Data for Epidemiologic Research to calculate age-adjusted mortality rates for PE as underlying cause of death from 1999 to 2018. We used the Joinpoint regression program to examine statistical trends and average annual percent change. Trends in PE mortality rates reversed after an inflection point in 2008, with an average annual percent change before 2008 of -4.4% (-5.7, -3.0, P<0.001), indicating reduction in age-adjusted mortality rates of 4.4% per year between 1999 and 2008, versus average annual percent change after 2008 of +0.6% (0.2, 0.9, P<0.001). Black men and women had approximately 2-fold higher age-adjusted mortality rates compared with White men and women, respectively, before and after the inflection point. Similar trends were seen in geographical regions. Age-adjusted mortality rates for younger adults (25-64 years) increased during the study period (average annual percent change 2.1% [1.6, 2.6]) and remained stable for older adults (>65 years). Conclusions Our study findings demonstrate that PE mortality has increased over the past decade and racial and geographic disparities persist. Identifying the underlying drivers of these changing mortality trends and persistently observed disparities is necessary to mitigate the burden of PE-related mortality, particularly premature preventable PE deaths among younger adults (<65 years).
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Causas de Muerte/tendencias , Disparidades en Atención de Salud/etnología , Mortalidad/tendencias , Embolia Pulmonar/mortalidad , Adulto , Negro o Afroamericano/estadística & datos numéricos , Anciano , Anciano de 80 o más Años , Centers for Disease Control and Prevention, U.S./organización & administración , Centers for Disease Control and Prevention, U.S./estadística & datos numéricos , Costo de Enfermedad , Certificado de Defunción , Etnicidad/estadística & datos numéricos , Femenino , Geografía , Disparidades en Atención de Salud/estadística & datos numéricos , Humanos , Masculino , Persona de Mediana Edad , Embolia Pulmonar/epidemiología , Embolia Pulmonar/prevención & control , Factores de Tiempo , Estados Unidos/epidemiología , Población Blanca/estadística & datos numéricos , MujeresRESUMEN
Background: Best practice for prevention, diagnosis, and management of venous thromboembolism (VTE) in patients with coronavirus disease 2019 (COVID-19) is unknown due to limited published data in this population. Objectives: We aimed to assess current global practice and experience in management of COVID-19-associated coagulopathy to identify information to guide prospective and randomized studies. Methods: Physicians were queried about their current approach to prophylaxis, diagnosis, and treatment of VTE in patients with COVID-19 using an online survey tool distributed through multiple international organizations between April 10 and 14, 2020. Results: Five hundred fifteen physicians from 41 countries responded. The majority of respondents (78%) recommended prophylactic anticoagulation for all hospitalized patients with COVID-19, with most recommending use of low-molecular-weight heparin or unfractionated heparin. Significant practice variation was found regarding the need for dose escalation of anticoagulation outside the setting of confirmed or suspected VTE. Respondents reported the use of bedside testing when unable to perform standard diagnostic imaging for diagnosis of VTE. Two hundred ninety-one respondents reported observing thrombotic complications in their patients, with 64% noting that the complication was pulmonary embolism. Of the 44% of respondents who estimated incidence of thrombosis in patients with COVID-19 in their hospital, estimates ranged widely from 1% to 50%. One hundred seventy-four respondents noted bleeding complications (34% minor bleeding, 14% clinically relevant nonmajor bleeding, and 12% major bleeding). Conclusion: Well-designed epidemiologic studies are urgently needed to understand the incidence and risk factors of VTE and bleeding complications in patients with COVID-19. Randomized clinical trials addressing use of anticoagulation are also needed.