https://messnervascular.com/wp-content/uploads/2026/03/IMG_9165.mp4 A Foundation Built on Advanced Surgical Training Dr. Messner’s career was shaped by extensive training in cardiovascular and thoracic surgery. He completed his medical

https://messnervascular.com/wp-content/uploads/2026/03/IMG_9163.mp4 In every hallway of a medical facility, there is more happening than meets the eye. Each step, each decision, and each interaction reflects a

Kidney failure, a grave health condition, can drastically alter one’s life. Therefore, It’s important to understand its causes for prevention and early intervention. Alarmingly, chronic

Denton A. Cooley, MD, and the Texas Heart Institute James J. Livesay, MD, Gregory N. Messner, DO, and William K. Vaughn, PhD PMID: 16107099   PMCID: PMC1163455 The

Igor D. Gregoric, MD, Michael T. Nolen, MD, Jus Ksela, MD, Linda B. Chandler, RN, Gregory N. Messner, DO, Roberto D. Cervera, MD, Frank W. Smart, MD, Reynolds M. Delgado, III, MD,

Gregory N. Messner, DO, Ali Azizzadeh, MD, T. Tam Huynh, MD, Anthony L. Estrera, MD, Eyal E. Porat, MD, and Hazim J. Safi, MD PMID: 16429916   PMCID: PMC1351843 Free PMC article

Igor D. Gregoric, MD, Roman Kosir, MD, Frank W. Smart, MD, Gregory N. Messner, DO, Vijay S. Patel, MD, Saverio La Francesca, MD, Roberto D. Cervera, MD, and O. H. Frazier, MD

O. H. Frazier, MD, Igor D. Gregoric, MD, and Gregory N. Messner, DO PMID: 16392230   PMCID: PMC1336720 Abstract We report the case of a 14-year-old boy who

Igor D Gregoric , Matthew T Harting, Roman Kosir, Vijay S Patel, Jus Ksela, Gregory N Messner, Saverio La Francesca, O H Frazier PMID: 16210123   DOI: 10.1016/j.healun.2004.12.109 Background: Several studies have shown that percutaneous

Gregory N. Messner, DO, Igor D. Gregoric, MD, Thomas Chu, MD, Branislav Radovancevic, MD, Biswajit Kar, MD, Scott D. Flamm, MD, and O. H. Frazier, MD PMID: 16429899 PMCID: PMC1351826 Abstract During heart