title: Unusual origin of the S-shaped (posterior) sinus node artery.
authors.affiliation: Department of Cardiology, Riyadh Armed Forces Hospital, Saudi Arabia.
authors.forename: M A
authors.initials: MA
authors.lastname: Habbab
authors.forename: S
authors.initials: S
authors.lastname: Alkasab
authors.forename: M
authors.initials: M
authors.lastname: Idris
authors.forename: M
authors.initials: M
authors.lastname: al-Zaibag
mesh_terms: D000792:Angiography; D003330:Coronary Vessel Anomalies / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008875:Middle Aged; D012849:Sinoatrial Node