With a PhD in Surgery from the Complutense University of Madrid and with an emphasis on Cardiovascular Surgery, Dr. Ramón Pérez-Caballero Martínez has specialized specifically in Pediatric Cardiovascular Surgery. His professional career spans numerous prestigious hospitals, including the Gregorio Marañón University Hospital and the 12 de Octubre University Hospital. 

His extensive professional career has led him to perform a wide range of surgeries, including cardiac transplants in adults and infants, mitral and aortic valve repair surgery and congenital heart disease surgery. His research focus is precisely on the surgical treatment of congenital heart disease in its entire spectrum, covering neonatal, pediatric and adult surgery in this specialty. 

• Attending Pediatric Cardiovascular Surgery. Gregorio Marañón General University Hospital 
• Attending at the Children's Cardiovascular Surgery Unit (Dr. R. Greco). Sanitas La Zarzuela Hospital 
• Attending at the Children's Cardiovascular Surgery Unit (Dr. R. Greco). Sanitas La Moraleja Hospital 
• Attending in the Children's Cardiovascular Surgery Unit (Dr. R. Greco). Nisa Pardo de Aravaca Hospital 
• Attending in the Children's Cardiovascular Surgery Unit (Dr. R. Greco). Hospital Quirón Pozuelo 
• Children's Cardiac Surgery Assistant. Pediatric Heart Institute. Doce de Octubre University Hospital 
• Doctor in Surgery, Complutense University of Madrid
• Degree in Medicine from the Faculty of Medicine of Santander. University of Cantabria 
• Specialist in Cardiovascular Surgery. Gregorio Marañón General University Hospital
• Honorary Collaborator of the Department of Surgery I, Complutense University of Madrid
• Diploma of Advanced Studies. Synchronized Ventricular Assistance 
• He has numerous publications in the area of cardiac surgery and transplantation in pediatrics