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About

Joseph Lamelas is a pioneering cardiac surgeon whose career has been defined by advancing minimally invasive approaches to mitral and tricuspid valve surgery. His research focuses on optimizing surgical techniques to reduce patient trauma while maintaining—or improving—clinical outcomes. Lamelas is the driving force behind the Mini-Mitral International Registry (MMIR), the largest global database of its kind, which has provided critical insights into the safety and efficacy of minimally invasive valve procedures. A landmark 2023 study from this registry, with 31 citations, established a direct correlation between aortic cross-clamp time and mortality, a finding that has reshaped intraoperative strategies. His 2025 work further refined the debate between direct vision and endoscopic approaches, analyzing over 7,500 patients to guide surgical decision-making. With a career dedicated to innovation, Lamelas has helped transform valve surgery from a high-risk, open-chest procedure into a more accessible, patient-friendly intervention. His contributions have set new standards in the field, making him a leading authority in minimally invasive cardiac surgery.