What does thrombolysis mean?
Thrombolysis is the process of dissolving a blood clot, or thrombus, that has formed inside a blood vessel. In modern medicine, the term most often refers to treatment with thrombolytic drugs, sometimes called clot-dissolving or clot-busting agents. It may be used in carefully selected cases of acute ischemic stroke, myocardial infarction, pulmonary embolism, or severe deep-vein thrombosis, with the route and method depending on the condition. Timely thrombolysis can restore blood flow and may save life or prevent lasting tissue damage. However, treatment also carries important risks, particularly serious bleeding, so clinicians assess a patient’s symptoms, imaging results, and contraindications before proceeding. The word is primarily associated with urgent hospital care and specialist medical discussion. It is also used more narrowly for catheter-directed delivery of a clot-dissolving drug. Understanding thrombolysis helps distinguish an attempt to remove an existing blockage through chemical or biological action from other treatments, such as anticoagulation, which limits further clot growth, and thrombectomy, which physically removes a clot.
nounThe medical dissolution of a thrombus, or blood clot, especially through thrombolytic treatment intended to restore blood flow.
- The dissolution of a thrombus within a blood vessel, especially by thrombolytic drugs or other agents.
"The patient received intravenous thrombolysis after imaging confirmed an eligible acute ischemic stroke."
"After imaging confirmed an eligible acute ischemic stroke, the patient received intravenous thrombolysis within the approved window."
"Catheter-directed thrombolysis was used to clear a large deep-vein thrombosis that was causing severe symptoms."
The plural is grammatically standard but uncommon; the singular is normally used when referring generally to the procedure or treatment.
"The two thrombolyses were performed in separate stroke centers."
Thrombolysis literally means “clot dissolving” — and that simple description captures one of medicine’s most time-sensitive treatments.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does thrombolysis come from?
The word combines the Greek noun θρόμβος, meaning “clot,” with λύσις, meaning “a loosening” or “dissolution,” through the combining form thrombo- and the suffix -lysis. The compound belongs to the same medical vocabulary as thrombosis, thrombus, and thrombocyte, all of which derive from θρόμβος. The related suffix -lysis also appears in words such as analysis and catalysis.
Related word forms
How thrombolysis is actually used
This is a specialized medical term used chiefly in clinical and scientific contexts. It normally refers to deliberate treatment rather than the body’s spontaneous dissolution of a clot, and it often carries an urgent clinical connotation because treatment must begin within a limited period for conditions such as acute ischemic stroke.
Easily confused with thrombolysis
Thrombosis is the formation of a blood clot, whereas thrombolysis is the process of dissolving one.
Thrombolysis dissolves a clot through biological or drug-assisted mechanisms, while thrombectomy removes it surgically.