Key result
Thoracic radiation is linked to long-term cardiovascular complications, particularly progressive valvular heart disease.
Why the study?
Mediastinal radiotherapy causes long-term cardiovascular complications including valvular heart disease, but management is challenging due to calcification and radiation-related injuries, with limited data on long-term transcatheter outcomes.
Given the delayed onset and progressive nature of radiation-associated VHD, structured long-term surveillance is essential to enable early detection and timely intervention in cancer survivors.
Supports consideration of long-term valvular surveillance in thoracic radiation survivors; leaves open optimal protocols and prospective validation.
Mediastinal radiotherapy plays a central role in the treatment of several malignancies, particularly Hodgkin lymphoma and breast cancer. However, exposure to thoracic radiation is associated with long-term cardiovascular complications, among which valvular heart disease (VHD) is increasingly recognized. Radiation-induced VHD typically presents after a latency period of 10-20 years and is characterized by progressive valve fibrosis, thickening, and calcification, most commonly affecting the left-sided valves. Management of radiation-induced VHD generally follows standard guidelines but remains challenging due to extensive calcification and coexisting radiation-related cardiac or pulmonary injury. A history of thoracic radiotherapy is associated with increased perioperative risk and may negatively impact surgical outcomes, which often alters the risk-benefit balance and favors less invasive therapeutic approaches. Advances in the transcatheter approach have expanded treatment options for this high-risk population; however, data on long-term outcomes remain limited. Evolving dose-reduction techniques, such as deep-inspiration breath-hold, intensity-modulated radiotherapy, and proton therapy, together with predictive dosimetric models, aim to minimize future cardiac toxicity. Given the delayed onset and progressive nature of radiation-associated VHD, structured long-term surveillance is essential to enable early detection and timely intervention in cancer survivors at risk.
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Varvara et al. (2025) conducted a review in Radiation-induced valvular heart disease. Mediastinal radiotherapy was evaluated. Exposure to thoracic radiation is associated with long-term cardiovascular complications, particularly progressive valvular heart disease presenting 10-20 years post-exposure.
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