title: Rare presentation of intralobar pulmonary sequestration associated with repeated episodes of ventricular tachycardia.
abstract: Arterial supply of an intralobar pulmonary sequestration (IPS) from the coronary circulation is extremely rare. A significant coronary steal does not occur because of dual or triple sources of blood supply to sequestrated lung tissue. We present a 60-year-old woman who presented to us with repeated episodes of monomorphic ventricular tachycardia (VT) in last 3 mo. Radio frequency ablation was ineffective. On evaluation, she had right lower lobe IPS with dual arterial blood supply, i.e., right pulmonary artery and the systemic arterial supply from the right coronary artery (RCA). Stress myocardial perfusion scan revealed significant inducible ischemia in the RCA territory. Coronary angiogram revealed critical stenosis of proximal RCA just after the origin of the systemic artery supplying IPS. The critical stenosis in the RCA was stented. At 12 mo follow-up, she had no further episodes of VT or angina.
authors.affiliation: D Sheshagiri Rao, Ramachandra Barik, Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad 500082, Telangana, India.
authors.forename: D Sheshagiri
authors.initials: DS
authors.lastname: Rao
authors.affiliation: D Sheshagiri Rao, Ramachandra Barik, Department of Cardiology, Nizam's Institute of Medical Sciences, Hyderabad 500082, Telangana, India.
authors.forename: Ramachandra
authors.initials: R
authors.lastname: Barik
keywords: Angioplasty; Coronary artery disease; Coronary steal; Intralobar pulmonary sequestration; Ventricular tachycardia