Increased Prevalence of Coronary Atherosclerosis in Cancer Survivors: A Retrospective Matched Cross-sectional Study with Coronary CT Angiography.

Background: Cancer and cancer treatment may accelerate the development of cardiovascular disease. With the improved prognosis of cancer survivors, cardiovascular events are increasing in this patient group. However, it is unknown whether the prevalence of coronary atherosclerosis is increased in patients with a history of cancer. This study aims to evaluate the prevalence and severity of coronary atherosclerosis in different age groups of cancer survivors compared to matched controls.

Methods: Consecutive cancer survivors aged >30 years who underwent evaluation for stable coronary artery disease with coronary computed tomography angiography (CCTA) were included in this retrospective study. Propensity score matching was performed and cancer survivors were matched 1:2 to a control population without oncological history. The presence of coronary atherosclerosis was assessed in both groups.

Results: The study population consisted of 312 cancer survivors and 624 matched controls. Median age at CCTA scan was 59.2 [50.3-67.5] years and 66.0% was female. Coronary atherosclerosis was observed in 257 (82.4%) cancer survivors compared to 459 (73.6%) control patients with an Odds Ratio (OR) of 1.68 [95% CI: 1.19-2.36], p=0.003. Mainly younger cancer survivors aged between 30-59 years had an increased prevalence of coronary atherosclerosis with an OR of 2.21 [95% CI: 1.40-3.49] compared to control patients (p=0.001). In addition, thoracic radiotherapy showed a significant association with increased prevalence of atherosclerosis in the younger population with an OR of 3.29 ([95% CI: 1.70-6.38], p<0.001).

Conclusions: Patients with a history cancer have an increased prevalence of coronary atherosclerosis on CCTA compared to matched patients without cancer. This effect was most pronounced in younger patients aged 30-59 years.