Vascular Pathway Tracer

Trace blood flow from heart to any organ and back. Explore arterial supply pathways from the aorta and venous drainage routes including branch points and anastomoses.

Clinical

Pathway
Branches / Tributaries
Territory
Clinical

Select a vessel to trace its pathway from origin to termination.

How to Use

  1. 1
    Select a starting vessel or territory

    Choose an artery or vein by name (e.g., 'femoral artery,' 'portal vein') or select an organ whose blood supply or venous drainage you want to trace; the tool constructs the complete vascular pathway from aorta to capillary bed or from capillary bed to heart.

  2. 2
    Trace the full pathway with branching

    Follow the vessel through its named segments, branches, and anastomoses, with each segment labeled according to TA2 angiology nomenclature and annotated with the structures it supplies or drains, the fascial compartments it traverses, and clinically significant anastomotic connections.

  3. 3
    Examine clinical correlates and collateral pathways

    Review ischemia patterns for arterial occlusion at any point in the traced pathway, identify collateral routes that may preserve perfusion, and access pulse examination sites, angiographic landmarks, and endovascular access points relevant to interventional radiology.

About

The cardiovascular system delivers oxygen and nutrients to every cell of the human body through a network of arteries, capillaries, and veins estimated to total approximately 100,000 kilometers in length. Terminologia Anatomica 2nd edition catalogues this network through TA2 angiology nomenclature, naming every artery and vein from the aorta and vena cava to their named terminal branches. Understanding vascular pathways is fundamental to internal medicine, surgery, interventional radiology, and emergency medicine — the consequence of arterial occlusion or venous thrombosis at any point is directly determined by the territory supplied and the availability of collateral circulation.

The Vascular Pathway Tracer provides interactive navigation through the complete arterial and venous tree, enabling users to trace any vessel from its origin to its destination, examine all named branches and anastomoses, and identify the clinical consequences of occlusion at each point. The coronary circulation follows AHA 16-segment nomenclature for consistency with cardiology documentation, while the cerebral circulation maps to established stroke territory classifications used by the American Heart Association and American Stroke Association. The portal venous system receives specialized treatment reflecting its central role in liver disease management.

For surgeons and interventional radiologists, the tool documents vascular access points, standard catheterization landmarks, and the anatomical boundaries of surgical fields involving major vessels. For clinicians, ischemia territory maps support rapid localization of arterial events based on presenting symptoms and signs. These clinical correlations reflect the approach of standard vascular surgery and internal medicine references, including Rutherford's Vascular Surgery and Braunwald's Heart Disease, making the tool a practical bridge between anatomical education and clinical vascular medicine.

FAQ

What vascular territories are covered in the tracer?
The tracer covers the entire systemic arterial tree from the aorta (ascending, arch, descending thoracic, abdominal) through all named branches to the terminal arterioles of each organ system. The portal venous system (portal vein and its tributaries from the splenic, superior mesenteric, and inferior mesenteric veins) receives detailed treatment due to its clinical importance in liver disease and portosystemic shunting. The pulmonary circulation, coronary arteries (with standard angiographic nomenclature per AHA classification), and cerebral circulation (including the circle of Willis and its variants) are also fully represented.
How does the tool handle arterial anastomoses?
Arterial anastomoses — connections between branches of different vessels that allow collateral perfusion when one vessel is occluded — are flagged throughout the tool. Clinically important anastomoses include the anastomosis around the knee between the geniculate arteries (important in femoral artery occlusion), the anastomosis around the scapula between branches of the subclavian and axillary arteries, and the cruciate anastomosis at the proximal femur. The tool also identifies arterial arcades in the small bowel mesentery and the anastomotic connections between the internal and external carotid systems through the ophthalmic artery.
What is the clinical significance of the portal venous system?
The portal venous system carries nutrient-rich blood from the gastrointestinal tract and spleen to the liver for first-pass metabolism. In portal hypertension — caused by cirrhosis, Budd-Chiari syndrome, or portal vein thrombosis — pressure elevation in the portal system leads to opening of portosystemic anastomoses at the gastroesophageal junction (forming esophageal varices), umbilicus (forming caput medusae), rectum (forming hemorrhoids), and retroperitoneum (forming retroperitoneal collaterals). Understanding these anastomoses is critical for managing variceal bleeding and selecting TIPS (transjugular intrahepatic portosystemic shunt) candidates.
How are coronary arteries named in the tool?
Coronary artery nomenclature follows the American Heart Association (AHA) 16-segment coronary artery classification, which designates each segment of the left anterior descending (LAD), left circumflex (LCx), and right coronary artery (RCA) with a standard number and name. This system is used universally in cardiology reports, cardiac catheterization findings, and CCTA (coronary CT angiography) interpretations. The tool displays the myocardial territory supplied by each coronary segment, cross-referenced with the ECG leads that reflect ischemia in that territory, supporting the integration of coronary anatomy with electrocardiographic interpretation.
Can I use this tool to understand stroke territory anatomy?
Yes — the cerebrovascular section maps the territory supplied by each major cerebral artery: the anterior cerebral artery (medial frontal and parietal cortex, supplementary motor area), middle cerebral artery (lateral hemisphere, primary motor and sensory cortex, language areas in the dominant hemisphere), posterior cerebral artery (occipital cortex, medial temporal lobe, thalamus), and the posterior inferior cerebellar artery (lateral medulla and inferior cerebellum — the territory of Wallenberg syndrome). Watershed zones between territories, vulnerable to global hypoperfusion, are also identified. This anatomical mapping supports the neurological localization expected of medical students and neurology trainees.

Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.