Pattakos Gregory

Pattakos Gregory Cardiac Surgeon

Attending Surgeon, 2nd Department of Cardiac Surgery, Assistant Director, Division of Transcatheter Heart Valves HYGEIA Hospital

Education & Academic Qualifications

Texas Heart Institute / Baylor College of Medicine, Houston, Texas

  • Cardiothoracic Surgery

Georgetown University Medical Center, Washington, D.C.

  • General Surgery

Clinical Research Fellowship
Cleveland Clinic, Heart and Vascular Institute, Cleveland, OH

  • NIH-NHLBI Clinical Research Scholar via the NHLBI-funded Cardiothoracic Surgical Trials Network (CSTN). Involved in the design and execution of randomized controlled clinical trials investigating ischemic mitral regurgitation and atrial fibrillation. Also involved in multiple observational studies.

Post-Graduate Degree
Case Western Reserve University, Cleveland, OH

  • Master of Science in Clinical Research

Medical Education
Georgetown University School of Medicine, Washington, D.C.

  • MD

Undergraduate Education
Tufts University, Medford, MA

  • Bachelor of Science in Biology, Cum Laude


Fellowship in Societies, Membership in Journal Editorial Committees

  • American Board of Surgery

  • Society of Thoracic Surgeons

  • Southern Thoracic Surgical Association 

  • European Association for Cardio-Thoracic Surgery

  • American College of Surgeons

  • American College of Cardiology

  • American Heart Association

  • Athens Medical Association (Greece)

Ad-hoc Reviewer

  • Annals of Thoracic Surgery


Work Experience

  • Georgetown University Medical Center, Washington DC

  • Virginia Hospital Center, Arlington, Virginia

  • Children’s National Medical Center, Washington DC

  • Washington Hospital Center, Washington DC

  • Veteran’s Affairs Hospital, Washington DC

  • Baylor St. Luke’s Medical Center, Houston, Texas 

  • Ben Taub General Hospital, Houston, Texas 

  • Michael E. Debakey VA Medical Center, Houston, Texas 

  • Texas Children’s Hospital, Houston, Texas 

  • MD Anderson Cancer Center, Houston, Texas


Clinical & Research Interest

  • Coronary Artery Disease (Bypass surgery)

  • Mitral Valve Repair

  • Transcatheter Aortic Valve Replacement (TAVI / TAVR)

  • Surgical Aortic Valve Repair and Replacement

  • Tricuspid Valve Repair

  • Surgical and Transcatheter (TEVAR) Aneurysm Repair 

  • Surgery for Atrial Fibrillation (MAZE procedure)


Honors & Awards

  • American Association for Thoracic Surgery (AATS) 2017 Annual Meeting Poster Competition, Boston, Massachusetts. Awarded 2nd place winner out of 51 entries.


  • “Thoracic Infections and Hemoptysis” in LaPar, D., Mery, C., Turek J., TSRA Review of Cardiothoracic Surgery, (2nd edition)

  • “Post-TAVR management” in American College of Cardiology Transcatheter Valve Handbook (pending publication)


Recent Publications

  • Gulack BC, Kirkwood KA, Shi W, Smith PK, Alexander JH, Burks SG, Gelijns AC, Thourani VH, Bell D, Greenberg A, Goldfarb SD, Mayer ML, Bowdish ME; Cardiothoracic Surgical Trials Network (CTSN). Secondary surgical-site infection after coronary artery bypass grafting: A multi-institutional prospective cohort study. J Thorac Cardiovasc Surg. 2017 Dec 5. pii: S0022-5223(17)32412-1. doi: 10.1016/j.jtcvs.2017.10.078. [Epub ahead of print] 

  • Vardas PN, Stefanescu Schmidt AC, Lou X, Goldstone AB, Pattakos G, Fiedler AG, Stephens EH, Tchantchaleishvili V. Current Status of Endovascular Training for Cardiothoracic Surgery Residents in the United States. Ann Thorac Surg. 2017 Nov;104(5):1748-1754. doi: 10.1016/j.athoracsur.2017.07.020. Epub 2017 Sep 29.

  • Gahremanpour A, Pattakos G, Reul RM, Mirzai-Tehrane M. Diagnostic Imaging and Treatment of a Left Atrial Paraganglioma. Tex Heart Inst J. 2017 Aug 1;44(4):296-298. doi: 10.14503/THIJ-16-5749. eCollection 2017 Aug. No abstract available.

  • Pattakos G, Tolpin D, Ott DA. Resection of Celiac Artery Aneurysm with Bypass Grafting to the Splenic and Common Hepatic Arteries. Tex Heart Inst J. 2017 Feb 1;44(1):77-79. doi: 10.14503/THIJ-16-5802. eCollection 2017 Feb

  • Omer S, Cornwell LD, Bakshi A, Rachlin E, Preventza O, Rosengart TK, Coselli JS, LeMaire SA, Petersen NJ, Pattakos G, Bakaeen FG. Incidence, Predictors, and Impact of Postoperative Atrial Fibrillation after Coronary Artery Bypass Grafting in Military Veterans. Tex Heart Inst J. 2016 Oct 1;43(5):397-403. eCollection 2016.

  • Gillinov AM, Bagiella E, Moskowitz AJ, et al; CTSN. Rate Control versus Rhythm Control for Atrial Fibrillation after Cardiac Surgery. N Engl J Med. 2016 May 19;374(20):1911-21. doi: 10.1056/NEJMoa1602002. Epub 2016 Apr 4. 

  • Michler RE, Smith PK, Parides MK, et al; CTSN. Two-Year Outcomes of Surgical Treatment of Moderate Ischemic Mitral Regurgitation. N Engl J Med. 2016 May 19;374(20):1932-41. doi: 10.1056/NEJMoa1602003. Epub 2016 Apr 3. 

  • Goldstein D, Moskowitz AJ, Gelijns AC, et al; Two-Year Outcomes of Surgical Treatment of Severe Ischemic Mitral Regurgitation. N Engl J Med. 2016 Jan 28;374(4):344-53. doi: 10.1056/NEJMoa1512913. Epub 2015 Nov 9. 

  • Tong MZ, Pattakos G, He J, Rajeswaran J, Kattan MW, Barsoum WK, Blackstone EH, Johnston DR Sequentially Updated Discharge Model for Optimizing Hospital Resource Use and Surgical Patients’ Satisfaction. Ann Thorac Surg. 2015 Oct 17. pii: S0003-4975(15)00929-7. doi: 10.1016/j.athoracsur.2015.05.090. [Epub ahead of print]

  • Gillinov AM, Gelijns AC, Parides MK, et al; CTSN Investigators. Surgical ablation of atrial fibrillation during mitral-valve surgery. N Engl J Med. 2015 Apr 9;372(15):1399-409. doi: 10.1056/NEJMoa1500528. Epub 2015 Mar 16. 

  • Kron IL, Hung J, Overbey JR, et al; CTSN Investigators. Predicting recurrent mitral regurgitation after mitral valve repair for severe ischemic mitral regurgitation. J Thorac Cardiovasc Surg. 2015 Mar;149(3):752-61.e1. doi: 10.1016/j.jtcvs.2014.10.120. Epub 2014 Nov 6. 

  • Smith PK, Puskas JD, Ascheim DD, et al; Cardiothoracic Surgical Trials Network Investigators. Surgical treatment of moderate ischemic mitral regurgitation. N Engl J Med. 2014 Dec 4;371(23):2178-88. doi: 10.1056/NEJMoa1410490. Epub 2014 Nov 18. 

  • Acker MA, Parides MK, Perrault LP, et al; CTSN. Mitral-valve repair versus replacement for severe ischemic mitral regurgitation. N Engl J Med. 2014 Jan 2;370(1):23-32. doi: 10.1056/NEJMoa1312808. Epub 2013 Nov 18. 

  • Pattakos G, Koch CG, Blackstone EH. Jehovah’s Witnesses may not have identical outcomes with nontransfused non-witnesses after cardiac surgery–reply. JAMA Intern Med. 2013 Feb 11;173(3):249. doi: 10.1001/jamainternmed.2013.2139.

  • Mihaljevic T, Pattakos G, Gillinov AM, Bajwa G, Planinc M, Williams SJ, Blackstone EH Robotic posterior mitral leaflet repair: neochordal versus resectional techniques. Ann Thorac Surg. 2013 Mar;95(3):787-94. doi: 10.1016/j.athoracsur.2012.08.042. Epub 2012 Oct 25

  • Rader F, Pujara AC, Pattakos G, Rajeswaran J, Li L, Castel L, Chung MK, Gillinov AM, Costantini O, Van Wagoner DR, Blackstone EH. Perioperative heart-type fatty acid binding protein levels in atrial fibrillation after cardiac surgery. Heart Rhythm. 2013 Feb;10(2):153-7. doi: 10.1016/j.hrthm.2012.10.007. Epub 2012 Oct 5.

  • Pattakos G, Koch CG, Brizzio ME, Batizy LH, Sabik JF 3rd, Blackstone EH, Lauer MS Outcome of patients who refuse transfusion after cardiac surgery: a natural experiment with severe blood conservation. Arch Intern Med. 2012 Aug 13;172(15):1154-60. doi: 10.1001/archinternmed.2012.2449.

  • Pattakos G, Johnston D, Houghtaling P, Nowicki ER, Blackstone EH. Preoperative prediction of non-home discharge: A strategy to reduce resource utilization after cardiac surgery. J Am Coll Surg 2012 Feb;214(2):140-7.

  • Navia JL, Brozzi NA, Nowicki ER, Blackstone EH, Krishnamurthi V, Sinkewich MG, Rajeswaran J, Pattakos G, Lytle BW. Simplified perfusion strategy for removing retroperitoneal tumors with extensive cavoatrial involvement. J Thorac Cardiovasc Surg. 2011 Jul 22. [Epub ahead of print]

  • Pattakos G, Blackstone EH. The “vulnerable stage” of general surgery residency. Arch Surg. 2011 Aug;146(8):991

  • Kintsurashvili E, Duka A, Ignjacev I, Pattakos G, Gavras I, Gavras H Age-related changes of bradykinin B1 and B2 receptors in rat heart. Am J Physiol Heart Circ Physiol. 2005 Jul;289(1):H202-5. Epub 2005 Feb 11.