RESUMEN
<p><b>OBJECTIVE</b>To investigate the clinical and angiographic characteristics of left coronaroventricular microfistula.</p><p><b>METHODS</b>In his retrospective review, clinical, electrocardiogram, echocardiography and coronary angiography data were analyzed for patients with left coronaroventricular microfistula.</p><p><b>RESULTS</b>Left coronaroventricular microfistula was identified in 9 out of 8300 patients underwent coronary angiographies from 1998 to 2008 in our center. Seven patients were female (77.8%) and the average age was 71.5 years. All 9 patients had presenting symptoms of chest distress or dyspnea, coronary artery disease was documented in 5 (55.6%), hypertension in 2 (22.2%), valve disease in 1 (11.1%)and cardiomyopathy in 1 (11.1%) patient. Microfistula originated from one single coronary artery was seen in 1 patient (11.1%), from two coronary arteries in 6 patients (66.7%), from three coronary arteries in 2 patients (22.2%). The diagonal artery was involved in all patients. The characteristic sign of microfistula from CAG was intracavitary staining.</p><p><b>CONCLUSION</b>Microfistula between coronary arteries and left ventricle is a rare disease, often originates from two coronary vessels and diagonal artery is involved in most cases.</p>