RT Journal Article SR Electronic T1 Comparison of cardiac CT angiography coronary artery dimensions and ethnicity in Trinidad: the CADET pilot study JF Open Heart JO Open Heart FD British Cardiovascular Society SP e001922 DO 10.1136/openhrt-2021-001922 VO 9 IS 1 A1 Tonya Welch A1 Fidel Rampersad A1 Shastri Motilal A1 Naveen Anand Seecheran YR 2022 UL http://openheart.bmj.com/content/9/1/e001922.abstract AB Background This study aimed to determine if there were any significant differences in coronary artery (CA) dimensions at prespecified segments during cardiac CT angiography (CCTA) compared with ethnicity at an academic tertiary medical centre in Trinidad and Tobago.Methods Patients (n=170) who underwent CCTA from July 2016 to June 2021 at the Eric Williams Medical Sciences Complex were selected based on predefined selection criteria. The size of the left main and proximal, mid and distal diameters of the left anterior descending, left circumflex and right coronary artery (RCA) were measured using quantitative coronary angiography, syngo.CT Coronary Analysis (Siemens Healthineers AG, Erlangen, Germany). Routine medical history, cardiovascular medications and anthropometric data were also recorded. Comparisons were performed using an independent sample t-test and analysis of variance for continuous variables.Results One hundred and seventy participants were enrolled in this study. There were no statistically significant associations between gender and CA dimensions; however, there were significant associations between South Asian and Caribbean black ethnicities for almost all CA dimensions except for the distal RCA segment. These findings were replicated when the analysis was adjusted for body surface area with the addition of the mid-RCA segment, which was bordering near-significance (p value 0.051).Conclusions Significantly smaller CA dimensions were observed in South Asian patients compared with Caribbean black patients undergoing CCTA. This pilot study could be clinically significant for Trinidadian patients at risk of developing coronary artery disease.Trial registration number NCT04774861.Data are available on reasonable request.