Lone Star Heart


Michael P. Macris, MD
915 Gessner Rd
Plaza 3 Suite 170
Houston, TX 77024

Since 2010, Dr. Macris has served as the Chairman of the Cardiovascular Surgery Subcommittee of the Clinical Programs Committee of the Memorial Hermann Physicians Network. This group oversees cardiovascular surgery quality improvement, patient outcomes data collection via the Society of Thoracic Surgeons database, and patient safety initiatives for the Memorial Hermann Hospital System. In 2004, Dr. Macris was asked by Memorial Hermann Northwest Hospital to lead their efforts in establishing a state-of-the-art center for the surgical treatment of cardiovascular disease. Dr. Macris oversaw the development and implementation of every aspect of the new cardiovascular program, from the design of the operating rooms to protocols for patient care. The facility includes two custom-designed operating rooms, three cath labs, and an 8-bed single-stay dedicated Cardiovascular Surgery intensive care unit. Dr. Macris currently serves as the Medical Director of the Cardiovascular Service Line at Memorial Hermann Northwest Hospital and the Medical Director of the Cardiovascular Operating Room at Memorial City Medical Center.

About Dr. Macris

Michael P. Macris, MD, F.A.C.S

Cardiovascular and Thoracic Surgeon

After graduating from Harvard in 1979, Dr. Macris returned to his hometown of Augusta, Georgia to attend the Medical College of Georgia, then followed in the footsteps of his father and trained with Dr. Denton Cooley at the Texas Heart Institute. Dr. Macris started his private practice in 1996, initially with the Hospital Corporation of America at Spring Branch Hospital, then moving to the Memorial Hermann Hospital System in 2004, including Memorial Hermann Northwest Hospital and Memorial City Medical Center. As a private practitioner, Dr. Macris performs all operations personally, including preoperative assessment and postoperative. Dr. Michael P. Macris is recognized in the medical profession for his participation in the advancement of surgical techniques that improve patient outcomes. Dr. Macris incorporates minimally invasive surgical techniques in both valve surgery and coronary artery bypass. 


In selected patients, these techniques result in less pain, less blood transfusion, and faster recovery times. Since 1998, he has been a leader in the development and use of Off-Pump Coronary Artery Bypass (OPCAB) surgical techniques. OPCAB, or beating heart surgery, eliminates the need for a heart/lung machine to keep the patient's heart beating during bypass surgery. OPCAB has had a significant impact on the rate of positive surgical outcomes and on cost-effectiveness of cardiovascular care. This is because it can significantly reduce the risk of stroke and other complications that may result from conventional surgical techniques. Dr. Macris has also been an early adapter of endoscopic saphenous vein harvesting techniques, which reduce pain and improve early postoperative mobility

In 1996, Spring Branch Medical Center (SBMC) invited Dr. Macris to become its Medical Director of Cardiovascular Surgery. Five years later, the SBMC cardiovascular surgery program was awarded the highest ranking by the Texas HealthCare Information Council. Ranking is based on quality of care, as measured by morbidity and mortality rates; under Dr. Macris' leadership, the SBMC program achieved the lowest Morbidity and Mortality rates of all hospitals in the Houston metropolitan service area for 2001. Dr. Macris is widely published in his speciality, and is active as a speaker to numerous professional groups. He served on the HCA Clinical Cardiovascular Management Network, a highly regarded national organization dedicated to excellence in cardiovascular care from 1996-2004. 

Copyright © Michael P. Macris, MD. All Rights Reserved 

Professional Training & Experience 

  • ​Graduated cum laude with Bachelor of Arts from Harvard in 1979.

  • Researched electron microscopy at Emory University in Atlanta, 1980.

  • Earned M.D. from the Medical College of Georgia in Augusta, 1984.

  • Awarded research fellowship investigating cardiac transplantation and artificial heart technology at Cullen Cardiovascular Surgical research Laboratory, Texas Heart Institute, 1986-88. 

  • Completed residency in General Surgery at University of Texas-Houston Medical School, 1991.

  • Completed residency in thoracic surgery with Dr. Denton Cooley at the Texas Heart Institute (THI), 1993.

  • Former Assistant Professor of Surgery at UT-Houston.

  • Former Associate Director of Cardiovascular Surgical Research at THI.

  • Published award-winning reference book, Support and Replacement of the Failing Heart, 1996.