CRP and atrial fibrillation: Previous studies have revealed that the risk of developing AF is particularly elevated in several cancer subtypes, including lung, gastrointestinal, colorectal, hematologic, and genitourinary malignancies.55, 56, 57, 58 This could be due to nonspecific shared risk factors, such as systemic inflammation as signified by elevated C-reactive protein levels, and an imbalance between sympathetic and parasympathetic systems causing autonomic dysfunction in AF.59