Bystander coronary sinus diverticulum and left anterolateral accessory pathway

• Published in: Archivos de cardiología de México Vol. 71; no. 3; pp. 227 - 230
• Main Authors: Fuenmayor, A J, Fuenmayor, A M, Aranguibel, L
• Format: Journal Article
• Language: English
• Published: Mexico 01-07-2001
• Subjects: Adult; Catheter Ablation; Coronary Disease - complications; Coronary Disease - surgery; Diverticulum - complications; Female; Humans; Tachycardia, Paroxysmal - etiology; Tachycardia, Supraventricular - etiology
• ISSN: 1405-9940

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.