This 3D volume-rendered Computed Tomography Angiography (CTA) image provides a comprehensive visualization of the coronary arterial anatomy. The image displays the major coronary arteries originating from the ascending aorta and coursing over the epicardial surface of the heart. The Left Anterior Descending (LAD) artery is clearly visible descending along the anterior interventricular sulcus, exhibiting multiple diagonal branches. The Left Circumflex (LCX) artery is seen branching from the left main coronary artery and traveling along the left atrioventricular groove. The Right Coronary Artery (RCA) originates from the right coronary sinus and traverses the right atrioventricular groove. All visualized vessels appear patent with smooth luminal contours and no evidence of significant calcified or non-calcified atherosclerotic plaques or stenotic lesions. The myocardium is rendered in a dark, textured brown tone to provide anatomical contrast, and a 40mm scale bar is included for size reference. This diagnostic image is typical for assessing coronary artery disease (CAD) and evaluating coronary anatomy in a clinical setting.

This diagnostic image consists of two grayscale fluoroscopic frames from a coronary angiography procedure, a subset of left heart catheterization. The image on the left shows the right coronary artery (RCA) and its primary branches. The image on the right depicts the left coronary system, including the left main, left anterior descending (LAD), and left circumflex (LCx) arteries. Both panels demonstrate radiopaque catheters selectively engaged in the coronary ostia, with contrast medium filling the lumen to reveal vascular anatomy. The coronary arteries exhibit smooth luminal borders and a patent course without evidence of focal stenosis, significant narrowing, or obstructive coronary artery disease. Small radiopaque surgical or procedural hardware elements are visible in the background of both panels. This material is used to teach cardiovascular assessment, specifically the use of angiography to rule out obstructive atherosclerosis in patients presenting with acute cardiac symptoms like chest pain or ST-segment changes.

This set of three clinical photographs (A, B, and C) displays a dissected human heart specimen to illustrate coronary artery anatomy and branching patterns. Image A provides an anterosuperior view, highlighting the origins of the Right Coronary Artery (RCA) from the right aortic sinus and the Left Anterior Descending (LAD) and Left Circumflex (LCx) arteries near the Ascending Aorta (AA) and Pulmonary Artery (PA). Image B shows an anterior view of the heart, detailing the LAD descending in the anterior interventricular groove, the LCx wrapping around the left auricle (LAur), and the Left Marginal Artery (LMA) branching from the LCx. Image C presents a posterior view demonstrating a codominant coronary system. In this specimen, the Posterior Descending Artery (PDA) is formed by contributions from both the terminal branches of the RCA and the LCx as they meet at the crux of the heart. These images serve as educational material for cardiovascular anatomy, specifically focusing on variations in coronary dominance and the structural relationship between major epicardial vessels.

This diagnostic image consists of two side-by-side frames from a coronary angiogram (left heart catheterization). The left panel displays the left coronary artery (LCA) system, including the left main, left anterior descending (LAD), and circumflex arteries with their associated diagonal and marginal branches. The right panel demonstrates the right coronary artery (RCA) in a standard oblique projection. Both images show smooth, regular vessel calibers with well-defined margins and no evidence of significant atherosclerotic stenosis, abrupt narrowing, or filling defects. Contrast distribution is homogenous throughout the arterial tree, indicating normal flow dynamics. This visual serves as a clinical example of normal coronary anatomy in a patient presenting with cardiac symptoms (e.g., chest pain or ST-elevation), used to rule out obstructive coronary artery disease or spontaneous coronary artery dissection (SCAD) in the differential diagnosis of myopericarditis.

This clinical photograph of a dissected human heart specimen displays the internal anatomy of the coronary sinus and its associated venous tributaries. The primary feature is a significantly enlarged, funnel-shaped coronary sinus ostium (CSO). Positioned inferior to the CSO is the much smaller, rounded ostium of the great cardiac vein (GCV). The middle cardiac vein (MCV) and the posterior vein of the left ventricle (PVLV) are visible as smaller openings superior to the GCV. A critical anatomical variant, a persistent left superior vena cava (PLSVC), is shown draining into the coronary sinus from an inferior position. The specimen highlights the absence of the Thebesian valve at the CSO and the absence of the Vieussens valve at the GCV ostium. This image illustrates complex cardiac venous remodeling often associated with congenital anomalies like PLSVC, which can significantly alter the diameter and structure of the coronary sinus, holding importance for electrophysiological procedures and cardiac surgery.

A multi-panel figure illustrating normal human coronary venous anatomy using Cardiac Computed Tomography (CCT). Panels (a-c) present 3D volume-rendered reconstructions of the heart. Panel (a) shows the posterior view, highlighting the coronary sinus (CS) in the atrioventricular groove, draining into the right atrium (RA), alongside the middle cardiac vein (MCV/PIV), small cardiac vein (SCV), and right coronary artery (RCA). Panels (b) and (c) provide anterior and lateral views, demonstrating the great cardiac vein (GCV) transitioning from the anterior interventricular vein (AIV), running parallel to the left anterior descending artery (LAD). Panels (d) and (e) are multiplanar reformat (MPR) images showing the cross-sectional relationship between the CS, the RA, and the ventricular chambers. Panel (f) is an axial CCT slice identifying the valve of Thebesius (TV) at the ostium of the coronary sinus. The collection demonstrates the spatial orientation of the cardiac venous system relative to major coronary arteries and cardiac chambers for educational use in radiology and cardiology.

This composite diagnostic image demonstrates Cardiac Computed Tomography (CCT) reconstructions of a Type V Unroofed Coronary Sinus (UCSS). The figure displays five distinct post-processing modalities: (A) Multiplanar Reconstruction (MPR) axial view showing the coronary sinus (CS) inferior to the left atrium (LA); (B, C) Maximum Intensity Projection (MIP) views illustrating a 'Z'-shaped vascular communication between the LA and CS, and the convergence of the CS into the right atrium (RA). These images also detail the positioning of the great cardiac vein (GCV) and middle cardiac vein (MCV). (D, E) Volume Rendering (VR) and Cinematic Rendering (CR) provide 3D spatial context. Panel D utilizes color-coding (Yellow: LA, Red: RA, Green: CS) to differentiate cardiac chambers and the venous system, while Panel E offers high-fidelity realistic rendering of the heart's posterior surface. This image serves to educate on the utility of CCT post-processing for diagnosing complex congenital venous anomalies and understanding the three-dimensional relationship between the coronary sinus and the atrial chambers.