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Background: Acute coronary syndromes (ACS) which is consist of ST-elevation myocardial infarction (STEMI), non-ST-elevation myocardial infarction (NSTEMI) and unstable angina pectoris (USAP) are a group of diseases with acute vascular occlusion. In this article, we aimed to investigate the relationship between ACS types and multivessel disease in patients who underwent coronary angiography. Materials and Methods: A total of 2048 patients with ACS who underwent coronary angiography between July 2019 and September 2022 were included in the study. Demographic characteristics, lipid profile and angiography reports of the patients were examined, as well as epicrisis. Lipid profiles and the number of vessels with critical stenosis-were recorded by forming 3 groups as STEMI, NSTEMI and USAP. Results: 522 (25.4%) STEMI, 1116 (54.5%) NSTEMI and 410 (24.1%) USAP patients were included in the study. The STEMI group was younger than the NSTEMI and USAP group (p<0.001 and p=0.043, respectively), had a higher smoking rate (p=0.043 and p=0.027, respectively), had higher LDL-C values (p=0.040 and p<0.001, respectively). Three or more vessel disease was detected most in the STEMI group compared to the NSTEMI and USAP group (p<0.001, for all). There was a weak but positive significant correlation between LDL-C and HbA1c values and the number of vessels with coronary occlusion-stenosis (r:0.163, p<0.001; r:0.349, p<0.001, respectively). there was also negative correlation with HDL-C (r:-111, p=0.001). Conclusions: Multiple vessel disease was found to be more common in ACS patients presenting with STEMI. [ABSTRACT FROM AUTHOR]

Background: The aim of the study is to investigate the relationship between the diameters and collapsibility indices of coronary sinus (CS) and inferior vena cava (IVC) and invasively measured right atrial pressure (RAP), and to determine whether these parameters have predictive value on RAP. Methods: A total of 136 patients undergoing right heart catheterization due to pulmonary arterial hypertension were included in the study prospectively. CS diameters, IVC diameters, CS collapsibility index (CSCI), and IVC collapsibility index (IVCCI) were measured by echocardiography before catheterization. Pearson correlation analysis was used to compare the parameters. Receiver operating characteristics (ROC) curve analysis was used to determine the predictive value of the CS and IVC collapsibility indices in predicting RAP. Results: Patients were divided into two groups as invasively measured RAP≥10 mm Hg (n:57) and RAP < 10 mm Hg (n:79). In the group with RAP≥10 mm Hg, IVC and CS diameters were higher than in the group with RAP < 10 mm Hg, while the IVCCI and CSCI were lower (p < 0.001). A negative correlation was observed between CSCI and IVCCI and RAP. Also, a positive correlation was observed between CSCI and IVCCI. Optimal cut‐off value for IVCCI was 46.1 with a sensitivity of 75%, and specificity of 79.7%. Optimal cut‐off value for CSCI was 39.2 with a sensitivity of 75.4%, and specificity of 88.6%. Conclusion: CS and IVC diameters and collapsibility indices measured by echocardiography were found to be associated with invasively measured RAP, and may be used together for estimating RAP. [ABSTRACT FROM AUTHOR]