About Us

cardiostream_team_bwCardiostream, LLC is based in the Atlanta, Georgia area and is a web-based clinical review solution. The CardioStream™ concept originated in 2002 when two physicians began to take notice of the time and process needed to acquire a final report for cardiac ultrasound exams completed in their office.

Not only did the use of VCR's and written reports seem antiquated; the time needed to send off the preliminary report for interpretation and return of the final report delayed the patient care continuum.

 After conferring with healthcare professionals and engaging the support of clinical, networking, and programming professionals—CardioStream was born.

 CardioStream didn't want to develop a product that offered the same old solutions, they wanted to utilize the power of the web and move clinical data by a method that is convenient and accessible for clinicians. Enabling physicians and healthcare providers the ability to read and interpret diagnostic studies on any computer, anytime, anywhere.



Lloyd Heckman - President

Lloyd has over 30 years’ experience in the Medical industry and has been a part of the Management Team at Cardiostream for over 11 years. He began his career in 1985 with IMED Corporation where he started as a District Manager and was quickly promoted to Sale Management where he remained until 1992. He has held Executive Management positions with companies such as IMED Corporation (now Alaris-CareFusion), Bimedco, SunQuest Information Systems, Triple G Corporation (now GE Medical Systems) and Sysware Healthcare Systems (now Eclipsys Corporation)


Yu Zhao - Director of Software Development

Prior to Cardiostream, Yu Zhao worked at BlueCube software (now Red Prairie) and Radiant Systems, designing and developing enterprise scale application for retail industry using Microsoft Technologies. He combines strong technology background and in-depth software development skills with a good view on business requirements. He is passionate about technology and enjoys identifying business needs and translating them into workable technical solutions. He holds Microsoft certifications as a Database Administrator and Solutions Developer (MCDBA, MCSD), and received a MS in Computer Information from The Georgia State University.


David Mistretta - Director of Network Services

David brings to Cardiostream over 20 years of IT experience to CardioStream. Prior to joining CardioStream, David worked as Managing Engineer at BlueWave Computing, supporting all aspects of technology for medical practices. David has also worked with PSINet, Verso Technologies, Harbinger, and other companies where he designed and supported server and application monitoring systems that drove the Network Operations alerting systems, hosted application infrastructures, and IT engineering and support experience.  David also holds industry certifications as a MCSE and CISSP.


David Higgins - Project Manager

David brings to Cardiostream 16 years of experience in the healthcare industry. David’s career began in 1999 at Goodroe Healthcare Solutions (now VHA, Inc.) where he performed many roles during his tenure, until he joined their implementation team and remained in this role until 2012. He has also held positions at McKesson Provider Technologies as a Technical Consultant on the Horizon Patient Folder upgrade team, and as a Senior Implementation Engineer at Clinithink, LLC delivering a web-based Natural Language Processing solution.


Yan Yu - Quality Assurance

Prior to her software Quality Assurance position at Cardiostream, Yan spent 6 years in software development with full system development life-cycle in our Software Development Department. Yan graduated from Washington State University with a Master’s degree in Physics. She then got her Java Programmer Certification and started working in IT industry. After 8+ years in application development using .NET, C# and Java, she joined the Cardiostream team.  Her attention to detail and analytically expertise are invaluable to our quality assurance system.

Executive Committee

C-Bryce-Hartley-II-2C. Bryce Hartley II M.D. FCCP - Partner

Fellowship: Georgetown University Medical Center
Residency: Tulane University Medical School
Medical School: Wake Forest University

Dr. Hartley joined Georgia Lung Associates in 1986, and since 2013 has served as a member of the clinical staff at Piedmont Healthcare at their Atlanta campus. He is currently the director of the General Pulmonary Medicine Center of Excellence Initiative at Piedmont Hospital Atlanta.

Dr. Hartley previously served as chairman of the Department of Medicine at Wellstar Cobb Medical Center and Hospital, was a member of the Executive Committee of the same facility, and served on the Executive Board of Georgia Lung Associates for 10 years.

Dr Hartley is a member of the ATS, and a diplomat of the American College of Chest Physicians

Edward_SwartzEdward I. Swartz, M.D., Founder (Deceased 2009)

Edward I. Swartz, MD, CEO, Following completion of his subspecialty training in Pulmonary/Critical care medicine at Case Western Reserve University in 1984 he started Georgia Lung Associates an independent clinical medical practice in metro Atlanta. He served for 25 years as the managing partner at GLA which eventually expanded to an 18 physician 15 advanced practice provider Pulmonary/Critical care practice that was eventually acquired by Piedmont Healthcare System in Atlanta. The practice included all aspects of pulmonary and critical care medicine including a 12 bed sleep lab, clinical research, allergy, immunology, and on site pulmonary rehabilitation. Office technology included CT and ultrasound imaging, echocardiography non invasive cardiopulmonary exercise equipment, and five complete pulmonary function labs. Dr. Swartz was instrumental in the development of Southeast Research Associates (SERA) into one of the largest private pulmonary and critical care research units in the U.S. that was subsequently acquired by Protocare, Inc. a Santa Monica based research site management organization. SERA and Protocare were then acquired by Radiant Research, Inc. Dr. Swartz brought 20 years of successful medical entrepreneurships to CardioStream.

eileen_schwartzEileen M Swartz - Managing Member

Financial operations for Cardiostream have been managed by Eileen for the last 5 years. Prior management experience includes positions as a Nursing Supervisor in Home Healthcare for Visiting Nurse Association of Cleveland and Medical Personnel Pool of Atlanta. As a founding officer for Georgia Lung Associates (now Piedmont Healthcare) , Eileen was instrumental in it becoming the largest Pulmonary Practice in the southeast. She was recently recognized for her work on the Founding Board for the Friends Group for the Chattahoochee River National Recreation Area. Eileen received her BSN from St John College of Nursing and concentrated her team leading experience on the Cardiac Surgery Floor of the Cleveland Clinic.

Medical Advisory Board

eisnerRobert L. Eisner, PhD

An Associate Professor in the Radiology department at the Emory University School of Medicine, Atlanta, Georgia.  He is the co-director of Nuclear Cardiology and Cardiac MR Imaging at Emory University Hospital Midtown, Atlanta, Georgia.