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  1. Asvestas D, Xenos T, Goga C, Tzeis S. Ventricular ectopy originating from an echogenic focus of the anterolateral papillary muscle: the contribution of intracardiac echocardiography. J Echocardiogr. 2021 Jan 16.
  2. Asvestas D, Xenos T, Vardas P, Tzeis S. Bipolar radiofrequency catheter ablation of premature ventricular contractions arising from the left ventricular summit. Hellenic J Cardiol. 2020 Dec 31:S1109-9666(20)30290-6.
  3. Tzeis S, Asvestas D, Moraitis N, Vardas EP, Mililis P, Letsas K, Kouvelas K, Nikita KS, Vardas P. Safety of smartwatches and their chargers in patients with cardiac implantable electronic devices. Europace. 2020 Oct 10:euaa220.
  4. Tzeis S, Asvestas D, Sakadakis E, Trika C, Vardas P. Atrial fibrillation cryoablation in cor triatriatum dexter. Europace. 2020 Jul 1;22(7):1.
  5. Letsas KP, Efremidis M, Bazoukis G, Dragasis S, Megarisiotou A, Mililis P, Saplaouras A, Vlachos K, Asvestas D, Valkanas K, Tse G, Sideris A. High-density mapping of de novo focal atrial tachycardias using a new software: Protected low-voltage areas by zones of conduction delay. J Arrhythm. 2020 Jun 14;36:785-788.
  6. Letsas KP, Dragasis S, Bazoukis G, Prappa E, Megarisiotou A, Asvestas D, Vlachos K, Mililis P, Saplaouras A, Tyrovolas K, Valkanas K, Tse G, Sideris A, Efremidis M. The aortic cusps are the predominant successful ablation site of idiopathic outflow-tract ventricular arrhythmias. J Electrocardiol. 2020 Jul-Aug;61:63-65.
  7. Tzeis S, Tsiachris D, Asvestas D, Kourouklis S, Patsourakos F, Karlis D, Kouskos G, Papadimitriou G, Gavriilidou M, Vatkalis N, Kapetanios K, Koufaki P, Taxiarchou E, Giannakoulas G; REFLEC-CR study investigators. Beneficial Effect of Flecainide Controlled Release on the Quality of Life of Patients with Atrial Fibrillation-the REFLEC-CR Study. Cardiovasc Drugs Ther. 2020 Jun;34(3):383-389.
  8. Asvestas D, Bazoukis G, Mililis P, Dragasis S, Megarisiotou A, Vlachos K, Sideris A, Efremidis M, Letsas KP. Fasciculoventricular bypass tracts: Electrocardiographic and electrophysiologic features. J Arrhythm. 2020 May 8;36:537-541.
  9. Bazoukis G, Kollias G, Tse G, Saplaouras A, Mililis P, Sakellaropoulou A, Kolokathis AM, Asvestas D, Efremidis M, Sideris A, Letsas KP. Reel syndrome-An uncommon etiology of ICD dysfunction. Clin Case Rep. 2020 Jan 30;8(3):582-583.
  10. Tse G, Lee S, Gong M, Mililis P, Asvestas D, Bazoukis G, Roever L, Jeeveratnam K, Hothi SS, Li KHC, Liu T, Letsas KP. Restitution metrics in Brugada syndrome: a systematic review and meta-analysis. J Interv Card Electrophysiol. 2019
  11. Bazoukis G, Letsas KP, Vlachos K, Saplaouras A, Asvestas D, Tyrovolas K, Rokiza A, Pagkalidou E, Tse G, Stavrakis S, Sideris A, Efremidis M. Simple hematological predictors of AF recurrence in patients undergoing atrial fibrillation ablation. J Geriatr Cardiol. 2019 Sep;16(9):671-675. doi: 10.11909/j.issn.1671-5411.2019.09.008.
  12. Letsas KP, Bazoukis G, Efremidis M, Georgopoulos S, Korantzopoulos P, Fragakis N, Asvestas D, Vlachos K, Saplaouras A, Sakellaropoulou A, Mililis P, Strempelas P, Giannopoulos G, Gavrielatos G, Tzeis S, Kardamis C, Katsivas A, Deftereos S, Stavrakis S, Sideris A. Clinical characteristics and long-term clinical course of patients with Brugada syndrome without previous cardiac arrest: a multiparametric risk stratification approach. Europace. 2019 Oct 22. pii: euz288.
  13. Vardas P, Cowie M, Dagres N, Asvestas D, Tzeis S, Vardas EP, Hindricks G, Camm J. The electrocardiogram endeavour: from the Holter single-lead recordings to multilead wearable devices supported by computational machine learning algorithms. Europace. 2019 Sep 18
  14. Letsas KP, Efremidis M, Vlachos K, Asvestas D, Takigawa M, Bazoukis G, Frontera A, Giannopoulos G, Saplaouras A, Sakellaropoulou A, Mililis P, Dragasis S, Megarisiotou A, Valkanas K, Tse G, Liu T, Deftereos S, Sideris A, Baranchuk A, Jais P.Right ventricular outflow tract low-voltage areas identify the site of origin of idiopathic ventricular arrhythmias: A high-density mapping study. J Cardiovasc Electrophysiol. 2019 Sep 9.
  15. Asvestas D, Melissi A, Ypsilanti E, Vardas P, Tzeis S. Atrial tachycardia arising from the tricuspid annulus – Insight into electrocardiographic and electrophysiologic features. J Electrocardiol. 2019;57:18-20.
  16. Bazoukis G, Letsas KP, Thomopoulos C, Tse G, Korantzopoulos P, Naka KK, Kalfakakou V, Vlachos K, Bazoukis X, Papadatos SS, Michelongona P, Saplaouras A, Georgopoulos S, Karamichalakis N, Asvestas D, Liu T, Efremidis M, Sideris A, Tsioufis C, Baranchuk A, Stavrakis S. Predictors of Adverse Outcomes in Patients With Arrhythmogenic Right Ventricular Cardiomyopathy: A Meta-Analysis of Observational Studies.Cardiol Rev. 2019:189-19
  17. Tzeis S, Asvestas D, Yen Ho S, Vardas P. Electrocardiographic landmarks of idiopathic ventricular arrhythmia origins. Heart. 2019;105:1109-1116
  18. Li T, Xu Q, Liao HT,Asvestas D, Letsas KP, Li Y. Transvenous dual-chamber pacemaker implantation in patients with persistent left superior vena cava. BMC Cardiovasc Disord. 2019 29;19:100
  19. Tzeis S, Asvestas D, Vardas P. Atrial Fibrosis: Translational Considerations for the Management of AF Patients. Arrhythm Electrophysiol Rev. 2019;8:37-41.
  20. Dimitrios Asvestas, Antigoni Sakellaropoulou, Panagiotis Mililis, Michael Efremidis, Antonios Sideris, Konstantinos P Letsas Flecainide enhances endocardial unipolar voltage abnormalities in Brugada syndrome. European Journal of Arrhythmia & Electrophysiology , 2018;4:Epub ahead of print.
  21. Efremidis M, Vlachos K, Letsas KP, Bazoukis G, Martin R, Frontera A, Asvestas D, Saplaouras A, KitamuraΤ, Georgopoulos S, Valkanas K, Karamichalakis N, Takigawa M, Sideris A, Derval N, Sacher F, Jais P. Targeted ablation of specific electrogram patterns in low voltage areas after pulmonary vein antral isolation in persistent atrial fibrillation: Termination to an organized rhythm reduces atrial fibrillation recurrence. J Cardiovasc Electrophysiol. 2018 Oct 4
  22. Asvestas D, Vlachos K, Bazoukis G, Martin CA, Letsas KP, Sakellaropoulou A, Kossyvakis C, Saplaouras A, Prappa E, Goga C, Vassilikos V, Valkanas K, Deftereos S, Sideris A, Efremidis M.Left atrial voltage mapping using a new impedance-based algorithm in patients with paroxysmal atrial fibrillation. Pacing Clin Electrophysiol. 2018 Sep 17
  23. Tse G, Bazoukis G, Roever L, Liu T, Wu WKK, Wong MCS, Baranchuk A, Korantzopoulos P, Asvestas D, Letsas KP. T-Wave Indices and Atherosclerosis. Curr Atheroscler Rep. 2018 Sep 17;20:55.
  24. LetsasKP, XydonasS, KaramichalakisN, EfremidisM, ManolatosD, BazoukisG, Asvestas D, VlachosK, GeorgopoulosS, SaplaourasA, WinterJ, SiderisA. Intermuscularimplantationtechniqueforsubcutaneouscardioverter-defibrillators. 2018 Feb 21.
  25. Asvestas D, Tse, G., Baranchuk, A., Bazoukis, G., Liu, T., Saplaouras, A., Korantzopoulos, P., Goga, C., Efremidis, M., Sideris, A., Letsas, K.P. High risk electrocardiographic markers in Brugada Syndrome. International Journal of Cardiology Heart & Vasculature. 18:58-64. DOI: 10.1016/j.ijcha.2018.03.001.
  26. Letsas KP, Efremidis M, Asvestas D, Vlachos K, Georgopoulos S, Tse G, Liu T, Bazoukis G, Sideris A, Baranchuk A, Ehrlich JR, Brugada P. Circ Arrhythm Electrophysiol. Right Ventricular Outflow Tract Electroanatomical Abnormalities Predict Ventricular Fibrillation Inducibility in Brugada Syndrome. 2018 Feb;11(2):e005928.
  27. Asvestas D, Bazoukis G, Tse G, Lampropoulos K, Salachas A. Bilateral coronary arteriovenous fistulas drained into the left ventricle. Hellenic J Cardiol. 2018 Jan 3.
  28. Letsas KP, Asvestas D, Baranchuk A, Liu T, Georgopoulos S, Efremidis M, Koratzopoulos P, Bazoukis G, Tse G, Sideris A, Takagi M, Ehrlich JR. Prognosis, risk stratification and management of asymptomatic individuals with Brugada syndrome: A systematic review. Pacing Clin Electrophysiol. 2017 Oct 10. doi: 10.1111/pace
  29. Vlachos K, Efremidis M, Letsas KP,Bazoukis G, Martin R, Kalafateli M, Lioni L, Georgopoulos S, Saplaouras A,  Efremidis T, Liu T, Valkanas K, Karamichalakis N,  Asvestas D, Sideris A. Low-voltage areas detected by high-density electroanatomical mapping predict recurrence after ablation for paroxysmal atrial fibrillation. J Cardiovasc Electrophysiol. 2017 Sep 8.
  30. Vlachos K, Efremidis M, Bazoukis G, Letsas KP, Saplaouras A, Georgopoulos S, Karamichalakis N, Rokiza A, Sakellaropoulou A, Kolokathis AM, Efremidis T, Asvestas D, Sideris A. Clin Cardiol. 2017 May 31. Safety and efficacy of DOACs vs acenocoumarol in patients undergoing catheter ablation of atrial fibrillation. doi: 10.1002/clc.22734
  31. Letsas KP, Efremidis M, Vlachos K, Georgopoulos S, Karamichalakis N, Asvestas D, Valkanas K, Korantzopoulos P, Liu T, Sideris A. Right ventricular outflow tract high-density endocardial unipolar voltage mapping in patients with Brugada syndrome: evidence for electroanatomical abnormalities. Europace. 2017 May 2. doi: 10.1093/europace/eux079
  32. Dimitrios Asvestas; Richard Balasubramaniam; Mark Sopher; John Paisey; Girish G Babu. Extended bipolar Left Ventricular pacing as a possible therapy for late Electrical Storm induced by Cardiac Resynchronization Therapy. J Electrocardiol. 2017;50:349-352
  33. Dedeilias P, Baikoussis NG, Prappa E, Asvestas D, Argiriou M, Charitos C. Aortic valve replacement in elderly with small aortic root and low body surface area the Perceval S valve and its impact in effective orifice area. J Cardiothorac Surg. 2016 11;11(1):54.
  34. Letsas KP, Efremidis M, Vlachos K, Asvestas D, Georgopoulos S, Xydonas S, Valkanas K, Sideris A, Toutouzas K, Tousoulis D. Catheter ablation of idiopathic fascicular ventricular tachycardia: The role of isolated diastolic potentials during mapping in sinus rhythm. Int J Cardiol. 2015 15;201:212-4.
  35. Efremidis M, Letsas K, Giannopoulos G, Lioni L, Vlachos K, Asvestas D, Karlis D, Kareliotis V, Geladari H, Sideris A, Deftereos S. Early pulmonary vein reconnection as a predictor of left atrial ablation outcomes for paroxysmal atrial fibrillation. Europace. 2015;17(5):741-6.
  36. Konstantinos Vlachos, MD, Dimitrios Asvestas, MD, Louiza Lioni, MD, Dimitrios Karlis, MD, Konstantinos P. Letsas, MD, Michael Efremidis, MD, Antonios Sideris, MD Inflammatory Response and Congestive Heart Failure Following Extensive Left Atrial Ablation. Hospital Chronicles 2015, 10(1): 37–38.
  37. Letsas KP, Efremidis M, Sgouros NP, Vlachos K, Asvestas D, Sideris A. Catheter ablation of persistent atrial fibrillation: The importance of substrate modification. World J Cardiol 2015; 7(3): 111-118
  38. Lioni L, Vlachos K, Letsas KP, Efremidis M,Karlis D, Asvestas D, Kareliotis V,Xydonas S, Dimopoulos N, Korantzopoulos P,Trikas A, Sideris A. Differences in quality of life, anxiety and depression in patients with paroxysmal atrial fibrillation and common forms of atrioventricular reentry supraventricular tachycardias. Indian Pacing Electrophysiol J.2014 6;14(5):250-7
  39. Louiza Lioni, MD,Konstantinos P. Letsas, MD,  FESC, Michael Efremidis, MD, Konstantinos Vlachos, MD, Dimitrios Karlis, MD,  Dimitrios Asvestas, MD, Constantinos C. Mihas, MD, Antonios Sideris, MD. Gastroesophageal reflux disease is a predictor of atrial fibrillation recurrence following left atrial ablation. Int J Cardiol.2015;15;183:211-3.
  40. Dimitrios Asvestas, Konstantinos Vlachos, Anastasios Salachas, Konstantinos P Letsas, Antonios Sideris. Headache: An unusual presentation of acute myocardial infraction. World J Cardiol. 2014;26; 6(6): 514–516.
  41. Konstantinos P. Letsas, Dimitrios Asvestas, Konstantinos Vlachos, Dimitrios Karlis, Panagiotis Korantzopoulos, Michael Efremidis, Antonios Sideris. Electrocardiographic characteristics of premature ventricular contractions in subjects with type 1 pattern of Brugada syndrome.J Electrocardiol2014;47(3):351-5
  42. Konstantopoulou A, Tsikrikas S, Asvestas D, Korantzopoulos P, Letsas KP. Mechanisms of drug-induced proarrhythmia in clinical practice. World J Cardiol. 2013; 26;5(6):175-85
  43. Konstantinos P. Letsas, Michael Efremidis, Konstantinos Vlachos, Dimitrios Karlis, MD, Louiza Lioni, Dimitrios Asvestas, Kosmas Valkanas, Constantinos C. Mihas, Antonios Sideris. The impact of catheter ablation in the interpulmonary isthmus on atrial fibrillation ablation outcomes: a randomized study. J Cardiovasc Electrophysiol.2014;25(7):709-13.
  44. Letsas, K., Efremidis, M., Vlachos, K., Asvestas D, Sideris, A.Catheter Ablation of Ventricular Extrasystoles Originating from the Left Coronary Cusp. Hospital Chronicles2014, 9(1): 36–38
  45. Spyros Tsikrikas, Konstantinos Letsas, Panagiotis Korantzopoulos, Charalampos Charalampous, Charalampos Ntavelas, George Bakosis, Charalampos Kavvouras, Dimitrios Asvestas, Antonios Sideris.Elevated Levels Within the Normal Limits of Liver Enzymes in Patients With Atrial Fibrillation. Hospital Chronicles2012, 7(3): 156–161.