CTEPH

When a blood clot occurs, your body may naturally dissolve it through an internal “clot-busting” process. At the same time, anticoagulant medications (blood thinners) can keep a clot from growing larger and can also prevent new clots from forming. But in a small number of patients who’ve had blood clots in their lungs—a pulmonary embolism (PE)—the clots don’t go away, resulting in a condition called chronic thromboembolic pulmonary hypertension (CTEPH).