Case 33 — Pulmonary Artery Echocardiograms

Echocardiogram showing enlarged MPA and RPA with heartworms visibleSecond view of enlarged RPA with heartworm tram tracks visible

Enlarged RPA with arrow indicating heartworm

These views show an enlarged main pulmonary artery (MPA) and markedly enlarged right pulmonary (RPA) branch. The left pulmonary artery (LPA) branch cannot be seen well. In the distal RPA you can see two parallel lines that look like "tram" tracks (arrow; just to the left of the RPA label in each view). These are heartworms.

Right parasternal cross-sectional view of the RVOT, pulmonary valve, main PA, and right PA from a different dog with heartworms in the RPA

↑