title: Bystander coronary sinus diverticulum and left anterolateral accessory pathway.
abstract: Left posteroseptal accessory pathways have been described inside coronary sinus diverticula. We here describe the case of a patient who was suffering from recurrent episodes of paroxysmal supraventricular tachycardia and had a concealed accessory pathway located in the left anterolateral margin of the mitral annulus and a left posterior coronary sinus diverticulum associated with an aneurysmal coronary sinus vein. In the electrophysiological study, an orthodromic supraventricular tachycardia was induced and reproduced. We performed a successful radiofrequency ablation of the pathway. Our case provides evidence of the coexistence of concealed accessory pathways capable of sustaining orthodromic tachycardia coexisting with a bystander posterior coronary sinus diverticulum and aneurysmal coronary sinus vein.
authors.affiliation: Electrophysiology Section, Cardiovascular Research Center Abdel M Fuenmayor P, University of The Andes, Mérida, Venezuela. farocha@ing.ula.ve
authors.forename: A J
authors.initials: AJ
authors.lastname: Fuenmayor
authors.forename: A M
authors.initials: AM
authors.lastname: Fuenmayor
authors.forename: L
authors.initials: L
authors.lastname: Aranguibel
mesh_terms: D000328:Adult; D017115:Catheter Ablation; D003327:Coronary Disease / Q000150:complications* / Q000601:surgery; D004240:Diverticulum / Q000150:complications*; D005260:Female; D006801:Humans; D013614:Tachycardia, Paroxysmal / Q000209:etiology*; D013617:Tachycardia, Supraventricular / Q000209:etiology*