Vascular & Venous Disease
D-Dimer Blood Test
A normal D-dimer rules out a blood clot in low-risk patients. A high result means you may need a scan. It does not mean you have a clot. The test works best to rule clots out.
This is a free, plain-language patient education guide written by Rias Ali, MD, FACC, a board-certified interventional cardiologist. Every guide is grounded in current peer-reviewed evidence and major society guidelines, organized in a way patients can actually use during a visit.
Download the D-Dimer Blood Test guide
What's inside this guide
- Plain-language explanation of d-dimer blood test
- Why it matters and what the major risks are
- Treatment options with risks, benefits, and alternatives
- Common misconceptions clarified
- Lifestyle and self-care advice
- Specific warning signs — when to call us, when to call 911
- Sources used to build the guide (peer-reviewed and society guidelines)