Based on the provided trial information about treating pulmonary embolism, the key treatments involved are:

Thrombolytic medication is administered through a catheter directly into the blood clot in the pulmonary artery. This medication helps to break down blood clots that are blocking blood flow to the lungs. This targeted approach allows the clot-dissolving medication to work directly at the site of the blockage.

Standard anticoagulants are blood-thinning medications that help prevent existing blood clots from getting bigger and stop new clots from forming. These medications are the conventional treatment for pulmonary embolism and work throughout the entire bloodstream to prevent clotting.

Pulmonary Embolism (PE) – A condition where one or more blood clots block arteries in the lungs. The clot typically forms in a deep vein of the leg and travels through the bloodstream to the lungs. This blockage affects blood flow and decreases oxygen levels in the blood. PE can cause shortness of breath, chest pain, and rapid heartbeat. The severity can range from small clots with minimal symptoms to larger ones affecting significant portions of the lungs.

Chronic Thromboembolic Pulmonary Hypertension (CTEPH) – A rare form of high blood pressure affecting the lungs and heart. It develops when old blood clots in lung arteries become hardened scar tissue, permanently blocking or narrowing these vessels. This condition leads to increased pressure in the pulmonary arteries and causes the heart to work harder. Symptoms typically include breathlessness during physical activity, fatigue, and chest discomfort.