title: Single coronary arteries: two cases with distinct and previously undescribed angiographic patterns.
abstract: Single coronary artery is a rare congenital anomaly, sometimes associated with myocardial ischemia. We present the clinical and angiographic features of two symptomatic patients with documented myocardial ischemia and with distinct and previously undescribed patterns of single right coronary arteries. These cases are new variants of the types R-I and R-II-A, in which the most probable mechanisms of ischemia are the insufficient blood supply, due to the long trajectories of the single arteries and the presence of underdeveloped vessels. Also, our second case presented with a fistulae from the LCX to the left ventricle, which is another determinant of myocardial ischemia.
authors.affiliation: Department of Interventional Cardiology, Heart Institute, Rua Oscar Freire 1234, apto. 101 Jd. America CEP: 01426-000, Sao Paulo, SP, Brazil. fsbrito@usp.br
authors.forename: F S
authors.initials: FS
authors.lastname: Brito
authors.forename: C B
authors.initials: CB
authors.lastname: Vianna
authors.forename: A M
authors.initials: AM
authors.lastname: Caixeta
authors.forename: M A
authors.initials: MA
authors.lastname: Rati
authors.forename: M A
authors.initials: MA
authors.lastname: Perin
authors.forename: J A
authors.initials: JA
authors.lastname: Ramires
authors.forename: E E
authors.initials: EE
authors.lastname: Martinez Filho
mesh_terms: D001158:Arteries / Q000002:abnormalities; D017023:Coronary Angiography; D003330:Coronary Vessel Anomalies / Q000150:complications* / Q000000981:diagnostic imaging; D005260:Female; D005402:Fistula / Q000150:complications; D006352:Heart Ventricles / Q000002:abnormalities; D006801:Humans; D008297:Male; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000000981:diagnostic imaging / Q000209:etiology