• Adherence to oral anticoagulation in ischemic stroke patients with atrial fibrillation 

      Tiili P., Leventis I., Kinnunen J., Svedjebäck I., Lehto M., Karagkiozi E., Sagris D., Ntaios G., Putaala J. (2021)
      Background: Non-vitamin K antagonist oral anticoagulants (NOAC) have superior safety and comparable efficacy profile compared to vitamin-K antagonists (VKAs), with more convenient dosing schemes. However, issues with ...
    • Analysis of the quality of reporting of randomized controlled trials in anticoagulant versus antiplatelet medication for venous thromboembolism prophylaxis as governed by the CONSORT statement 

      Beneki E., Vrysis C., Zintzaras E., Doxani C. (2021)
      Randomized controlled trials (RCTs) are the gold standard research in evaluating healthcare interventions. The CONSORT (Consolidated Standards of Reporting Trials) statement improves the quality of RCTs in an evidence-based ...
    • Assessment of the reporting quality of RCTs for novel oral anticoagulants in venous thromboembolic disease based on the CONSORT statement 

      Liampas I., Chlinos A., Siokas V., Brotis A., Dardiotis E. (2019)
      Randomized controlled trials (RCTs) are the cornerstone of evidence based medicine. Ιt is crucial that RCTs have transparent reporting to facilitate their interpretation. The purpose of the present study is the evaluation ...
    • Bleeding risk comparison between direct oral anticoagulants at doses approved for atrial fibrillation and aspirin: systematic review, meta-analysis and meta-regression 

      Sagris D., Leventis I., Georgiopoulos G., Korompoki E., Makaritsis K., Vemmos K., Milionis H., Lip G.Y.H., Ntaios G. (2020)
      Background: A considerable proportion of patients with atrial fibrillation (AF) are still treated with aspirin despite current guidelines due to presumed favorable safety. Aim: We performed a systematic review and meta-analysis ...
    • Causes and Risk Factors of Cerebral Ischemic Events in Patients with Atrial Fibrillation Treated with Non-Vitamin K Antagonist Oral Anticoagulants for Stroke Prevention: The RENo Study 

      Paciaroni M., Agnelli G., Caso V., Silvestrelli G., Seiffge D.J., Engelter S., De Marchis G.M., Polymeris A., Zedde M.L., Yaghi S., Michel P., Eskandari A., Antonenko K., Sohn S.-I., Cappellari M., Tassinari T., Tassi R., Masotti L., Katsanos A.H., Giannopoulos S., Acciarresi M., Alberti A., Venti M., Mosconi M.G., Vedovati M.C., Pierini P., Giustozzi M., Lotti E.M., Ntaios G., Kargiotis O., Monaco S., Lochner P., Bandini F., Liantinioti C., Palaiodimou L., Abdul-Rahim A.H., Lees K., Mancuso M., Pantoni L., Rosa S., Bertora P., Galliazzo S., Ageno W., Toso E., Angelini F., Chiti A., Orlandi G., Denti L., Flomin Y., Marcheselli S., Mumoli N., Rimoldi A., Verrengia E., Schirinzi E., Del Sette M., Papamichalis P., Komnos A., Popovic N., Zarkov M., Rocco A., Diomedi M., Giorli E., Ciccone A., Grory B.C.M., Furie K.L., Bonetti B., Saia V., Guideri F., Acampa M., Martini G., Grifoni E., Padroni M., Karagkiozi E., Perlepe K., Makaritsis K., Mannino M., MacCarrone M., Ulivi L., Giannini N., Ferrari E., Pezzini A., Doronin B., Volodina V., Baldi A., D'Amore C., Deleu D., Corea F., Putaala J., Santalucia P., Nardi K., Risitano A., Toni D., Tsivgoulis G. (2019)
      Background and Purpose-Despite treatment with oral anticoagulants, patients with nonvalvular atrial fibrillation (AF) may experience ischemic cerebrovascular events. The aims of this case-control study in patients with AF ...
    • COVID-19 associated pulmonary embolism with D-dimer values within the referent range: A case report and review of the literature 

      Javorac J., Živanovic D., Stojkov S., Milicic J.D., Fradelos E., Savic N. (2021)
      OBJECTIVE: COVID-19 is associated with an increased incidence of pulmonary embolism (PE). Elevated D-dimer levels are linked to an increased risk of PE and poor clinical outcome. We reported a case of PE in a COVID-19 ...
    • Difficult situations in anticoagulation after stroke: Between Scylla and Charybdis 

      Ntaios G., Lip G.Y.H. (2016)
      Purpose of review A significant proportion of stroke patients is treated with anticoagulants for secondary stroke prevention. Often, in such patients, stroke physicians are required to make difficult clinical decisions ...
    • Direct oral anticoagulant-vs Vitamin K antagonist-related nontraumatic intracerebral hemorrhage 

      Tsivgoulis G., Lioutas V.-A., Varelas P., Katsanos A.H., Goyal N., Mikulik R., Barlinn K., Krogias C., Sharma V.K., Vadikolias K., Dardiotis E., Karapanayiotides T., Pappa A., Zompola C., Triantafyllou S., Kargiotis O., Ioakeimidis M., Giannopoulos S., Kerro A., Tsantes A., Mehta C., Jones M., Schroeder C., Norton C., Bonakis A., Chang J., Alexandrov A.W., Mitsias P., Alexandrov A.V. (2017)
      Objective: To compare the neuroimaging profile and clinical outcomes among patients with intracerebral hemorrhage (ICH) related to use of vitamin K antagonists (VKAs) or direct oral anticoagulants (DOACs) for nonvalvular ...
    • Early recurrence and major bleeding in patients with acute ischemic stroke and atrial fibrillation treated with Non-Vitamin-K oral anticoagulants (RAF-NOACs) Study 

      Paciaroni M., Agnelli G., Falocci N., Tsivgoulis G., Vadikolias K., Liantinioti C., Chondrogianni M., Bovi P., Carletti M., Cappellari M., Zedde M., Ntaios G., Karagkiozi E., Athanasakis G., Makaritsis K., Silvestrelli G., Lanari A., Ciccone A., Putaala J., Tomppo L., Tatlisumak T., Abdul-Rahim A.H., Lees K.R., Alberti A., Venti M., Acciarresi M., D'Amore C., Becattini C., Mosconi M.G., Cimini L.A., Soloperto R., Masotti L., Vannucchi V., Lorenzini G., Tassi R., Guideri F., Acampa M., Martini G., Sohn S.-I., Marcheselli S., Mumoli N., De Lodovici M.L., Bono G., Furie K.L., Tadi P., Yaghi S., Toni D., Letteri F., Tassinari T., Kargiotis O., Lotti E.M., Flomin Y., Mancuso M., Maccarrone M., Giannini N., Bandini F., Pezzini A., Poli L., Padovani A., Scoditti U., Denti L., Consoli D., Galati F., Sacco S., Carolei A., Tiseo C., Gourbali V., Orlandi G., Giuntini M., Chiti A., Giorli E., Gialdini G., Corea F., Ageno W., Bellesini M., Colombo G., Monaco S., Baronello M.M., Karapanayiotides T., Caso V. (2017)
      Background--The optimal timing to administer non-vitamin K oral anticoagulants (NOACs) in patients with acute ischemic stroke and atrial fibrillation is unclear. This prospective observational multicenter study evaluated ...
    • Early recurrence in paroxysmal versus sustained atrial fibrillation in patients with acute ischaemic stroke 

      Paciaroni M., Angelini F., Agnelli G., Tsivgoulis G., Furie K.L., Tadi P., Becattini C., Falocci N., Zedde M., Abdul-Rahim A.H., Lees K.R., Alberti A., Venti M., Acciarresi M., Altavilla R., D’Amore C., Mosconi M.G., Cimini L.A., Bovi P., Carletti M., Rigatelli A., Cappellari M., Putaala J., Tomppo L., Tatlisumak T., Bandini F., Marcheselli S., Pezzini A., Poli L., Padovani A., Masotti L., Vannucchi V., Sohn S.-I., Lorenzini G., Tassi R., Guideri F., Acampa M., Martini G., Ntaios G., Karagkiozi E., Athanasakis G., Makaritsis K., Vadikolias K., Liantinioti C., Chondrogianni M., Mumoli N., Consoli D., Galati F., Sacco S., Carolei A., Tiseo C., Corea F., Ageno W., Bellesini M., Silvestrelli G., Ciccone A., Scoditti U., Denti L., Mancuso M., Maccarrone M., Orlandi G., Giannini N., Gialdini G., Tassinari T., Lodovici M.L.D., Bono G., Rueckert C., Baldi A., Toni D., Letteri F., Giuntini M., Lotti E.M., Flomin Y., Pieroni A., Kargiotis O., Karapanayiotides T., Monaco S., Baronello M.M., Csiba L., Szabó L., Chiti A., Giorli E., Sette M.D., Imberti D., Zabzuni D., Doronin B., Volodina V., Michel Pd-Mer P., Vanacker P., Barlinn K., Pallesen L.P., Kepplinger J., Deleu D., Melikyan G., Ibrahim F., Akhtar N., Gourbali V., Yaghi S., Caso V. (2019)
      Background: The relationship between different patterns of atrial fibrillation and early recurrence after an acute ischaemic stroke is unclear. Purpose: In a prospective cohort study, we evaluated the rates of early ischaemic ...
    • Effectiveness and safety of intracranial events associated with the use of direct oral anticoagulants for atrial fibrillation: A systematic review and meta-analysis of 92 studies 

      Archontakis-Barakakis P., Li W., Kalaitzoglou D., Tzelves L., Manolopoulos A., Giannopoulos S., Giamouzis G., Giannakoulas G., Batsidis A., Palaiodimos L., Ntaios G., Lip G.Y.H., Kokkinidis D.G. (2022)
      Aims: Observational studies have investigated the effectiveness and safety of direct oral anticoagulants (DOACs) and vitamin K antagonists (VKAs) used in nonvalvular atrial fibrillation. We performed a systematic review ...
    • Embolic Stroke of Undetermined Source: JACC Review Topic of the Week 

      Ntaios G. (2020)
      The term embolic stroke of undetermined source (ESUS) was introduced in 2014 to describe patients with a nonlacunar ischemic stroke and no convincing etiology. The terms ESUS and cryptogenic stroke are not synonyms, as the ...
    • Interrupted versus uninterrupted anticoagulation therapy for catheter ablation in adults with arrhythmias 

      Bawazeer G.A., Alkofide H.A., Alsharafi A.A., Babakr N.O., Altorkistani A.M., Kashour T.S., Miligkos M., AlFaleh K.M., Al-Ansary L.A. (2021)
      Background: The management of anticoagulation therapy around the time of catheter ablation (CA) procedure for adults with arrhythmia is critical and yet is variable in clinical practice. The ideal approach for safe and ...
    • Major Hemorrhage Risk Associated with Direct Oral Anticoagulants in Non-Valvular Atrial Fibrillation: A Systematic Review and Meta-Analysis 

      Archontakis-Barakakis P., Kokkinidis D.G., Nagraj S., Gidwani V., Mavridis T., Ntaios G. (2022)
      Background: Real-world, observational studies have investigated the safety profile of Direct Oral Anticoagulants (DOACs) on Major Hemorrhage (MH) used for stroke prevention in Non-Valvular Atrial Fibrillation (NVAF). We ...
    • Neuroimaging and clinical outcomes of oral anticoagulant–associated intracerebral hemorrhage 

      Tsivgoulis G., Wilson D., Katsanos A.H., Sargento-Freitas J., Marques-Matos C., Azevedo E., Adachi T., von der Brelie C., Aizawa Y., Abe H., Tomita H., Okumura K., Hagii J., Seiffge D.J., Lioutas V.-A., Traenka C., Varelas P., Basir G., Krogias C., Purrucker J.C., Sharma V.K., Rizos T., Mikulik R., Sobowale O.A., Barlinn K., Sallinen H., Goyal N., Yeh S.-J., Karapanayiotides T., Wu T.Y., Vadikolias K., Ferrigno M., Hadjigeorgiou G., Houben R., Giannopoulos S., Schreuder F.H.B.M., Chang J.J., Perry L.A., Mehdorn M., Marto J.-P., Pinho J., Tanaka J., Boulanger M., Salman R.A.-S., Jäger H.R., Shakeshaft C., Yakushiji Y., Choi P.M.C., Staals J., Cordonnier C., Jeng J.-S., Veltkamp R., Dowlatshahi D., Engelter S.T., Parry-Jones A.R., Meretoja A., Mitsias P.D., Alexandrov A.V., Ambler G., Werring D.J. (2018)
      Objective: Whether intracerebral hemorrhage (ICH) associated with non–vitamin K antagonist oral anticoagulants (NOAC-ICH) has a better outcome compared to ICH associated with vitamin K antagonists (VKA-ICH) is uncertain. ...
    • New prophylaxis strategies to reduce the risk of thromboembolism in cancer 

      Papadopoulos V., Tsapakidis K., Markou A., Kokkalis A., Aidarinis C., Kotsakis A. (2021)
      Introduction: Patients with cancer are at risk of thrombotic events, mainly deep vein thrombosis and/or pulmonary embolism. The thrombosis risk is generally 4–6 times higher than in a healthy population and depends on ...
    • Non-vitamin-K oral anticoagulants (NOACs) for the prevention of secondary stroke 

      Diener H.-C., Ntaios G., O’Donnell M., Easton J.D. (2018)
      Introduction: In patients with atrial fibrillation (AF), oral anticoagulation with vitamin K antagonists (VKA) (warfarin, phenprocoumon) is effective both for primary and secondary stroke prevention with a 60–70% relative ...
    • Nonvitamin-K-Antagonist Oral Anticoagulants in Patients With Atrial Fibrillation and Previous Stroke or Transient Ischemic Attack A Systematic Review and Meta-Analysis of Randomized Controlled Trials 

      Ntaios, G.; Papavasileiou, V.; Diener, H. C.; Makaritsis, K.; Michel, P. (2012)
      Background and Purpose-To assess whether the combined analysis of all phase III trials of nonvitamin-K-antagonist (non-VKA) oral anticoagulants in patients with atrial fibrillation and previous stroke or transient ischemic ...
    • Oral anticoagulation versus antiplatelet or placebo for stroke prevention in patients with heart failure and sinus rhythm: Systematic review and meta-analysis of randomized controlled trials 

      Ntaios G., Vemmos K., Lip G.Y.H. (2019)
      Background: Previous meta-analyses of randomized controlled trials of oral anticoagulation in patients with heart failure and sinus rhythm reported reduced stroke risk and increased bleeding risk compared to antiplatelets ...
    • Perioperative management of DOACs in vascular surgery: A practical approach 

      Kouvelos G., Matsagkas M., Rousas N., Nana P., Mpatzalexis K., Stamoulis K., Giannoukas A., Arnaoutoglou E. (2018)
      Background: Approximately 10–15% of patients on DOACs have to interrupt their anticoagulant before an invasive procedure every year. The perioperative management and monitoring of DOACs have proved to be challenging, as ...