A 3-year-old male French Bulldog was evaluated due to recent history of intolerance to exercise and coughing. The clinical. radiographic. and echocardiographic findings were consistent with cor triatriatum sinister (CTS). https://www.bekindtopets.com/limited-value-Ruth-Thompson-Dead-of-Winter-Dragon-and-Warriors-Galaxy-S20-FE-Clear-Case-p104889-super-value/