Novel coronary artery anomaly in a French bulldog with pulmonary stenosis.

A 9-month-old French Bulldog with pulmonary stenosis (PS) underwent transthoracic echocardiography (TTE) and electrocardiogram-gated coronary computed tomography angiography (ECG-CCTA) for presurgical planning of pulmonary balloon valvuloplasty (PBV). Transthoracic echocardiography revealed severe PS and identified two distinct coronary ostia (left and right). Electrocardiogram-gated coronary computed tomography angiography showed a circumpulmonary course of the interventricular paraconal coronary artery, which abnormally originated from the right coronary artery. Based on this case report, the echocardiographic identification of two coronary ostia does not rule out a coronary artery anomaly with circumpulmonary course (as previously hypothesized), and coronary computed tomography angiography may be recommended for presurgical planning of PBV in French Bulldogs.