Current Projects - A&P/PUF Programs

NOTE: New research proposals requesting data from the STS National Database are assessed for overlap with active projects from all STS research programs, including PUF, A&P and Task Force on Funded Research (TFR). Please email the Research Center with any questions regarding this list.

Project Status Legend
Approved - Proposal has been approved for study by the A&P or PUF Task Force and its corresponding specialty review committee.
Analysis - Proposal is currently undergoing active analysis by the investigators and appropriate analytic center.
Abstract - An abstract for the proposal has been developed and submitted to a meeting.
Manuscript - A manuscript for the proposal has been drafted.

List last updated August 30, 2019.

Adult Cardiac Surgery Database (PUF)
Principal Investigator Proposal Title Project Status
Frederick Lombard
Vanderbilt University Medical Center
Intraoperative Processed EEG and Delirium, Neurologic Complications and Mortality After Cardiac Surgery Approved
Neel Sodha
Rhode Island Hospital
Predicting Hemorrhage and Thrombosis in Mechanical Circulatory Support: A Study Using Machine Learning Approved
Shinichi Fukuhara
University of Michigan
Surgical Explantation of Transcatheter Aortic Valve: Results and Clinical Implications Approved
Oz Shapira
Hadassah Medical Center
hanging Impact of Repeat CABG on Operative Outcomes in the Last Two Decades:Insights from the Society of Thoracic Surgeons Adult Cardiac Surgery Database Approved
Anju Nohria
Brigham and Women's Hospital
Comparative Outcomes of SAVR vs. TAVR in Mediastinal Radiation-Associated Aortic Valve Disease Analysis
Bradley Taylor
University of Maryland
Impact of Revascularization Technique On the Risk of Stroke and Mortality During Coronary Artery Bypass Grafting: The Analysis of the STS Adult Cardiac Surgery Database Approved
Victor Nauffal
Brigham and Women’s Hospital
Novel Oral Anticoagulants versus Warfarin for Post-Cardiac Surgery Atrial Fibrillation Analysis
Miklos Kertai
Vanderbilt University Medical Center
Intraoperative and postoperative dexmedetomidine and delirium, severity of postoperative pain and outcomes after cardiac surgery Analysis
Mario Gaudino
New York Presbyterian Hospital
Trends in the use of multi-arterial coronary bypass grafting in young patients Approved
Jonathan Haft
University of Michigan
Pulmonary thromboendarterectomy (PTE) for chronic thromboembolic pulmonary hypertension (CTEPH) Analysis
Ankur Kalra
Cleveland Clinic Foundation
Direct oral anticoagulants and mechanical valves: Trends in utilization and outcomes  Approved
Robert S. D. Higgins
Johns Hopkins University School of Medicine
Disparities in CABG Outcomes - STS Database Experience Approved
Hartzell Schaff
Mayo Clinic
Center Volume and Surgical Outcomes in Hypertrophic Cardiomyopathy: What Impacts Outcomes? Analysis
Brent Keeling
Emory University School of Medicine
Trends in Emergency Coronary Artery Bypass Surgery Approved
Tom Nguyen
University of Texas Health Science Center Houston, McGovern Medical School
Nationwide Outcomes of Less Invasive Mitral Surgery versus Conventional Sternotomy: Analysis of the Society of Thoracic Surgeons Adult Cardiac Surgery Database Abstract
Daniel Engelman
University of Massachusetts – Baystate
Skeletonized versus pedicled bilateral internal thoracic arteries harvesting - effects on peri-operative outcomes: Analysis of the STS Adult Cardiac Surgery Database Abstract
S. Chris Malaisrie
Northwestern University
30 Day Outcomes for Sutureless Rapid Deployment Valves Compared to Traditional Bioprosthetic Valves for Aortic Valve Replacement Abstract
Ravi Ghanta
Baylor College of Medicine
Outcomes of Aortic Valve Surgery for Chronic Aortic Regurgitation Approved
Thomas Gleason
University of Pittsburgh Medical Center
Trends and Outcomes of Mitral Valve Surgery for Papillary Muscle Rupture: An Analysis of the Society of Thoracic Surgeons National Database Analysis
Robert Hagberg
Hartford Hospital
Machine Learning methods for mortality and morbidity after Cardiac Surgery Abstract
Derek R. Brinster
Lenox Hill Hospital
Transfusion Requirements in Aortic Root Replacement  Manuscript
Ankur Kalra
Cleveland Clinic Foundation 
Surgical Aortic Valve Replacement in Bioprosthetic Failure: Insights from the STS National Database Manuscript
Michael J. Mack
The Heart Hospital Baylor Plano
Predicted Risk of Transfusion in Isolated AVR Analysis
Stephen E. Fremes
Sunnybrook Health Sciences Centre
The Changing Demographics in Bioprosthetic Valve Type and Size After the Introduction Of  Transcatheter Aortic Valve Replacement in the STS National Database Manuscript 
Toshinobu Kazui
The University of Arizona
Bilateral Mammary Artery Use in High HbA1c Patients Manuscript
Harlan M. Krumholz
Yale New-Haven Hospital
Using Machine Learning to Update Perioperative Risk Models with Incorporating Intraoperative Data Abstract
James R. Edgerton
The Heart Hospital Baylor Plano
Predicted Risk of Transfusion in Isolated CABG Manuscript
Michael P. Macris
Memorial Hermann Health System
The Impact of Time Interval Between Coronary Angiography and Cardiopulmonary Bypass on Acute Kidney Injury  Manuscript
Jacob T. Gutsche
University of Pennsylvania
Does Overnight Extubation Increase the Risk of Mortality in Cardiac Surgery Patients?  Manuscript
Thomas Kelley
Dwight D. Eisenhower Army Medical Center
Effect of a Balanced Transfusion Ratio on Survival in Patients in Hemorrhagic Shock After Cardiac Surgery  Manuscript
Donald Likosky
University of Michigan
Influence of Medicaid Access on Implantable Durable Left Ventricular Assist Device Usage and Outcomes: A Comparator Study with Heart Transplantation  Analysis 
Dan Loberman
Brigham and Women’s Hospital
Myocardial Preservation in Minimal Invasive Mitral Valve Surgery Manuscript
Tsuyoshi Kaneko
Brigham and Women's Hospital
Outcomes of Mitral Valve Surgeries in Patients with Mitral Annular Calcification  Manuscript
Giovanni Filardo
The Heart Hospital Baylor Plano
Predicted Risk of Transfusion in Isolated MVR and MV Repair Analysis 
Joseph F. Sabik III
University Hospitals Cleveland Medical Center
Trends in Use of FFR in Patients Undergoing Surgical Revascularization: Insights from the STS National Database  Abstract 
Thomas A. Schwann
Baystate Health
Elucidating Surgeon and Institutional Volume – Outcome Effects for Multi-Arterial and Single-Arterial Coronary Artery Bypass Grafting Strategies  Analysis
Joanna Chikwe
Stony Brook University Medical Center
Relationship between Duration of Circulatory Arrest, Temperature Nadir 
and Incidence of Post-Operative Neurological Deficits
Matthew Williams
University of Pennsylvania
Measuring The Learning Curve Analysis
Andrei Churyla
Northwestern Memorial Hospital
SAVR +AFIB Ablation and LAA Closure versus TAVR in Patients with Pre-Existing Atrial Fibrillation Abstract
M. Scott Halbreiner
Allegheny General Hospital
Use of Skeletonized Versus Pedicled Internal Thoracic Artery: Is There a Correlation with Sternal Wound Infection  Abstract
David L. Joyce
Medical College of Wisconsin
Minimally Invasive Versus Conventional Single Vessel LIMA-LAD Bypass Grafting: A Comparison of Surgical Outcomes from the STS National Database  Abstract 
Niv Ad
West Virginia University
The Safety of Off-Pump and On-Pump Surgical Ablation Procedures for Atrial Fibrillation  Manuscript
Zain I. Khalpey
University of Arizona
Predictive Strategies for the Prevention of Disease Outcomes      Analysis
Arman Kilic
University of Pittsburgh Medical Center
Evaluating the Predictive Capabilities of Machine Learning Algorithms in Isolated Aortic Valve Replacement Abstract
Arnar Geirsson
Yale School of Medicine
Pattern and Predictors of Oral Anticoagulant and Antiplatelet Use Following Aortic Valve Replacement and Mitral Valve Surgery 


Adult Cardiac Surgery Database (A&P)
Principal Investigator Proposal Title Project Status
Danny Chu
University of Pittsburgh School of Medicine
Optimal Temperature for Aortic Hemiarch Replacement Procedure with Antegrade Cerebral Perfusion Strategy: How Warm is too Warm? Approved
Robert Hooker
INTEGRIS Baptist Medical Center
Prosthetic Valve Endocarditis In Aortic Valve Surgery: The North American Experience Approved
Jennifer Lawton
Johns Hopkins Division of Cardiac Surgery
Gender Disparities in Surgical Coronary Revascularization Approved
Thomas Schwann
University of Massachusetts - Baystate
The Effects of Peri-operative Transfusions on Intermediate Term Mortality in Medicare Patients Undergoing CABG – A Report from the STS Cardiac Surgery Database 2011-2018 Approved
Nicholas Teman
University of Virginia
Extracorporeal Membrane Oxygenation vs. Right Ventricular Assist Device for LVAD Implant Related Right Ventricular Failure Approved
Vinod Thourani
Medstar Heart and Vascular Institute
Outcomes in patients undergoing mitral valve operations for ischemic mitral regurgitation in the United States Analysis
Mark Slaughter
University of Louisville
Short and Long Term Outcomes of Surgical Intervention for Tricuspid Valve Endocarditis   Approved
Wilson Szeto
University of Pennsylvania 
Outcomes with Elective Open Aortic Valve Replacement in Patients with Moderate or Greater Mitral Regurgitation Analysis
Manuel Caceres Polo
UCLA Medical Center
Trends and Outcomes of Post-Operative Renal Insufficiency following Open Heart Surgery in North America  Manuscript
Thomas Bilfinger
Stony Brook University School of Medicine
Acute Type A Aortic Dissection (ATAAD) Repair in the US: an STS National Database Report


Khaled Abdelhady
University of Illinois at Chicago
Zachary Kon
University of Maryland School of Medicine
Jeffrey Milliken University of California Irvine School of Medicine
Less-Invasive Aortic Valve Replacement: Trends and Outcomes from the Society of Thoracic Surgeons  Adult Cardiac Surgery Database  Manuscript
Prashanth Vallabhajosyula
University of Pennsylvania
Traditional Total Aortic Arch Replacement Versus Hybrid Arch Repair  Manuscript 
Joseph Bavaria
University of Pennsylvania
Outcomes with Elective Aortic Root Replacement in Patients with Pre-Operative Renal Insufficiency
Chad Hughes
Duke University Medical Center
Contemporary Results of Aortic Root Operations in the United States Manuscript
Carmelo A. Milano
Duke University Medical Center
Does Duration of Left Ventricular Assist Device Support  Have an Effect on Orthotopic Heart Transplantation Outcomes? Manuscript
George Tolis
Massachusetts General Hospital
TEVAR vs Open Repair of Descending Thoracic Aortic Pathology: Long-Term Outcomes Manuscript
Vinod Thourani
Medstar Heart and Vascular Institute
Relationship of Volume and Outcomes in those Patients undergoing AVR ± CABG in the US Manuscript
Frank Sellke
Beth Israel Deaconess Medical Center
Evaluation of amiodarone use without anticoagulation for new postoperative atrial fibrillation (AF) after coronary artery bypass grafting (CABG) Manuscript
Arnar Geirsson
Yale University School of Medicine
The evolving burden of heart valve replacement for endocarditis due to drug abuse: clinical outcomes and predictors of reoperation (Approved as joint collaborative project with Dr. Juan Crestanello) Analysis
Juan Crestanello
Mayo Clinic
The impact of recurrent intravenous drug associated endocarditis: how many re-operations we can perform? 
(Approved as joint collaborative project with Dr. Arnar Geirsson)


General Thoracic Surgery Database (PUF)
Principal Investigator Proposal Title Project Status
Christopher Seder
Rush University Medical Center
Impact of Obesity on Conversion to Thoracotomy in Video-Assisted vs Robotic-Assisted Pulmonary Resections Approved
Mark Allen
Mayo Clinic
A Study of Thoracic Surgeon bias in Lung Cancer Surgery Analysis
Peter Kneuertz
The Ohio State University Wexner Medical Center
Trends and Outcomes of Pulmonary Segmentectomy for Non-small Cell Lung Cancer by Robotic, Video-assisted thoracoscopic, and Thoracotomy Approach in the STS National Database Approved
Henning Gaissert
Massachusetts General Hospital
Diagnostic Accuracy in the STS-GTSD: Concordance of Clinical and Pathological Staging in Primary Non-Small Cell Lung Cancer Analysis
K. Robert Shen
Mayo Clinic
Patterns of Care and Outcomes following Lung Volume Reduction Surgery in the United States Analysis
Brian Louie
Swedish Medical Center and Cancer Institute
Temporal Trends and Outcomes Measures During Transition to Robotic Pulmonary Lobectomy Manuscript
Brandon H. Tieu
Oregon Health & Science University
Chylothorax After Esophagectomy: A Review of the STS National Database  Abstract
Matthew A. Facktor
Geisinger Medical Center
ProvenCare® Lung Cancer Collaborative Analysis
Ikenna C. Okereke
University of Texas Medical Branch
Outcomes After Surgical Lung Biopsy: An Analysis of the STS National  Database Approved
Christopher R. Morse
Massachusetts General Hospital
Role of Increasing Obesity in Perioperative Pathologic Staging Following Resection of Primary Esophageal Cancer  Abstract
Christopher W. Seder
Rush University Medical Center
Preoperative Predictors of Prolonged Air Leak Following Pulmonary Surgery Manuscript
Douglas J. Mathisen
Massachusetts General Hospital
Predictors and Impact of Extended Lymphadenectomy on Outcomes Following Esophagectomy for Primary Esophageal Cancer Analysis
Nicholas Arndt
Rush University Medical Center
Redefining the Risk of Surgery for Stage IIIA (N2) Non-Small Cell Lung Cancer: An Analysis of the STS General Thoracic Surgery Database Analysis
Daniel Boffa
Yale University School of Medicine
Impact of Invasive Nodal Staging on Nodal Upstaging in Surgically Managed Lung Cancer  Analysis
General Thoracic Surgery Database (A&P)
Principal Investigator Proposal Title Project Status
Daniel Miller and Elliot Servais
Wellstar Health System/Lahey Hospital and Medical Center
Quality Assessment of Reasons for Open Conversion During Minimally Invasive (Thoracoscopic and Robotic) Lung 
Resection and the Associated Morbidity and Mortality
Phillip Linden
University Hospitals 
Cleveland Medical Center
erioperative Risk of Each Individual Lobectomy Approved
David Harpole
Duke University
Open versus minimally invasive repair of pectus excavatum Abstract
Christopher Towe
University Hospitals Cleveland Medical Center
Classification of Factors Associated with Successful Early Discharge after Anatomic Lung Resection Analysis
Nathaniel R .Evans
Thomas Jefferson University Hospital
Predictors of Prolonged Air Leak and Chest Tube Duration After Lobectomy Manuscript
Lisa M. Brown
University of California Davis Medical Center
Prediction Score for Hospital Readmission After Lobectomy Manuscript
Yaron Perry
University Hospital Case Medical Center
Failure to Rescue after Esophagectomy: An Analysis of Postoperative Complications and Their Effect on Perioperative Mortality Manuscript
Manu S. Sancheti
Emory University School of Medicine
Socioeconomic Disparities Impact Outcomes of Lung Cancer Resection, a Review of the STS National Database Abstract
Farhood Farjah
University of Maryland School of Medicine
Evaluating the Impact of the Volume Pledge  for Lung Cancer Resections Among General Thoracic Surgery Database Participants Analysis
Congenital Heart Surgery Database (PUF)
Principal Investigator Proposal Title Project Status
Viviane Nasr
Boston Children’s Hospital
The geographic distribution of pediatric cardiac anesthesiologists relative to cardiac surgeons and pediatric cardiac surgeries in the United States Approved
Martina Steurer
Benioff Children's Hospital, UCSF
Associations between attained fetal growth and early postoperative outcomes in neonates with congenital heart disease Approved
Meena Nathan
Boston Children's Hospital
Outcomes Following Repair of Anomalous Origin of the Left Coronary Artery from the Pulmonary Artery (ALCAPA): A Descriptive Study Manuscript
Jennifer S. Nelson
Nemours Children's Hospital
Practice-Pattern Variation in Pediatric Aortic Valve Replacement  Manuscript
Henry L. Walters
Children's Hospital of Michigan
The Impact of Down Syndrome on the Outcome of Single Ventricle Palliation for a Functionally Univentricular Heart: Analysis of the STS National Database  Manuscript
Nicole D. Zantek
University of Minnesota
Risk Factors for Platelet Transfusion and Impact of Platelet Transfusions on Outcomes in Patients Undergoing Congenital Heart Surgery Analysis
Congenital Heart Surgery Database (A&P)
Principal Investigator Proposal Title Project Status
Marshall Jacobs
Johns Hopkins School of Medicine
Staged Operative Strategies in CHSD Analysis
Justin Long
Children’s Healthcare of  Atlanta/Emory University
Higher Postoperative Hematocrit And Increased Adverse Outcomes In Pediatric Cardiac Surgery Patients Analysis
James Tweddell 
Cincinnati Children’s Hospital Medical Center
Outcomes of Airway Disease Patients Undergoing Congenital Cardiac Surgery Analysis
Andrew Lodge
Duke University School of Medicine 
Factors Associated with Adverse Outcomes in Patients Undergoing Fontan Revision Surgery Abstract
Narutoshi Hibino
The Johns Hopkins Hospital
The Prevalence, Impact, and Management of Diaphragm Paralysis following Congenital Cardiac Surgery in Children Abstract
David P. Bichell
Monroe Carell Jr. Children's Hospital at Vanderbilt
Outcomes in Patients with Turners Syndrome  Undergoing Cardiac Surgical Interventions  Manuscript
David F. Vener
Texas Children’s Hospital
Comprehensive Review of the Congenital Cardiac Anesthesia Society – Society of Thoracic Surgeons Anesthesia-Related Information   Manuscript 
Faith Ross
Seattle Children’s Hospital
Associations Between Anthropometric Indices and Outcomes of Congenital Heart Operations in Infants and Young Children: An Analysis of Data from the STS National Database Manuscript
Jeffrey P. Jacobs
Johns Hopkins All Children’s Heart Institute
Creation and Evaluation of a Case Mix Index for Pediatric and Congenital Cardiac Surgery Analysis
Ram Kumar Subramanyan
Children’s Hospital, Los Angeles
Surgical Outcomes Following Repair of Tetralogy of Fallot with Absent Pulmonary Valve Syndrome Analysis
Robert D. B. Jaquiss
Duke University Medical Center
Post-Operative Cardiac Catheterization in Children Undergoing Congenital Heart Surgery: An Analysis of the STS Congenital Heart Surgery Database Manuscript
Intermacs/Pedimacs Database (PUF)
Principal Investigator Proposal Title Project Status
Sameed Khatana        
Hospital of the University of Pennsylvania    
Trends in durable Ventricular Assist Device Implantation Rates with the Affordable Care Act and Medicaid Expansion and Association of Post-Implantation Outcomes with Payor
Duc Thinh Pham        
Northwestern University
Risk Assessment Model for Wait List Mortality in Left Ventricular Assist Device Patients Analysis
Edward Grandin Assessing the impact of beta-blockers on late right heart failure and survival after left ventricular assist device implantation (PUF) Analysis

Please click here for additional information about current Intermacs projects in the A&P/PUF tracks.

Intermacs/Pedimacs Database (A&P)
Principal Investigator Proposal Title Project Status
Shahnawaz Amdani Cleveland Clinic Model for End-stage Liver Disease eXcluding INR (MELD-XI) score predicts outcomes in pediatric patients supported with Ventricular Assist Device: An analysis of the PediMACS registry Analysis
Francisco Arabia            
Banner Health/University of Arizona
Heart Transplant Outcomes post Total Artificial Heart BTT Approved
Jennifer Cowger              
Henry Ford Hospital
Ventricular Assist Device Patient Phenotypes: What Attributes Describe Long Term Survival? Approved
Robert Niebler                  
Medical College of Wisconsin
Incidence and Outcomes of, and Risk Factors for neurological adverse events in children support with ventricular assist devices Approved
Josef Stehlik                
University of Utah School of Medicine
Mortality by body mass index in adult heart transplant recipients – Direct to transplant vs. mechanical circulatory support bridge strategy Approved
Bryan Whitson                
The Ohio State University
Assessing The Impact Of Surgical Implant Approach On Peri-Operative Right Ventricular Failure Associated With Left Ventricular Assist Devices Approved

Please click here for additional information about current Intermacs projects in the A&P/PUF tracks.