Coronary Sinus Diameter as a Potential Marker of Right Ventricle Impairment

The aim of this study was to assess the influence of the parameters of the coronary sinus (CS) on the parameters that describe the function of the right ventricle (RV), which were calculated using cardiac computed tomography. Methods: A CT scan of the heart was performed on 150 patients due to suspicion of coronary artery disease using a Siemens Somatom Force (2 x 192 x 0.6) and a syngo.via workstation. The "CT coronary" and in some cases the generic presets were used to measure the CS ostium in millimeters (mm). The functional measurements of right heart ventricles were examined using the "CT cardiac function" automatic function on a 256 x 256 matrix. Results: The average diameter of the CS ostium was 16.29 +/- 4.37 mm. In the group with RV impairment, it was 16.56 +/- 4.76, whereas in the group with normal values of the RV, it was 15.98 +/- 3.88 mm, p = 0.4199. The average angle of the entrance of the CS into the right atrium was 107.25 degrees +/- 9.68 degrees. In the group with an RV impairment, it was 105.91 degrees +/- 9.22 degrees, while in the patients with normal values of the RV, it was 108.82 degrees +/- 10.04 degrees; p = 0.0682. A multiple regression showed that end systolic volume (p = 0.0017) and stroke volume (p = 0.0144) are important predictors of the CS ostium. Conclusions: Some relationships were found between the CS and the selected parameters that describe the function of the RV. This may suggest a role for the CS as a right ventricular buffer, which could potentially be treated as a marker of an RV impairment.