Digital Rhythm Surveillance After Postoperative Atrial Fibrillation in Cancer Survivors: A Cardio-Oncology Survivorship Pathway.

Postoperative atrial fibrillation (POAF) after cardiac surgery is often managed as a transient inpatient arrhythmia, yet recurrent or silent atrial fibrillation (AF) after discharge may identify persistent atrial vulnerability. This issue is particularly relevant in cancer survivors, whose thrombotic and bleeding risks vary according to cancer activity, treatment exposure, thrombocytopenia, frailty and planned procedures. For this narrative review, PubMed/MEDLINE and Scopus were searched from inception to 16 June 2026, with Google Scholar used for supplementary citation tracking. A total of 50 publications were included in the final narrative synthesis. Direct evidence at the intersection of cancer, cardiac surgery, POAF and digital monitoring remains limited. Accordingly, the proposed "Digital Cancer-POAF Survivorship Pathway" is presented as a conceptual, hypothesis-generating framework, rather than a validated clinical algorithm. Its distinctive contribution is to connect cancer-state phenotyping and treatment-specific arrhythmic risk with post-discharge rhythm surveillance, electrocardiogram (ECG) confirmation, multidisciplinary interpretation, data governance and outcomes for prospective validation. Digital monitoring may increase AF detection; however, whether it reduces stroke, bleeding, readmission, or healthcare utilisation in this population is unknown. Neither a low detected AF burden nor the absence of AF during finite monitoring has been validated as an independent basis for anticoagulation decisions.