title: Normalisation of hypoxaemia following successful percutaneous closure of a bidirectional shunting secundum atrial septal defect without pulmonary hypertension in a patient with severe non-ischaemic cardiomyopathy and refractory ventricular tachycardia.
abstract: Atrial septal defects (ASD) are an uncommon cause of dyspnoea. A high index of suspicion is required, and further investigation should be prompted in patients with unexplained hypoxaemia, particularly those with pulmonary hypertension. Hypoxic ASD without pulmonary hypertension are rare, and only a handful of cases have been published. We present a middle-aged man with progressive dyspnoea with a successfully closed ASD without pulmonary hypertension caused by elevated right ventricular pressures secondary to an idiopathic cardiomyopathy.
authors.affiliation: Department of Cardiology, Royal Melbourne Hospital, Melbourne, Victoria, Australia.
authors.forename: R D
authors.initials: RD
authors.lastname: Anderson
authors.affiliation: Department of Cardiology, Royal Melbourne Hospital, Melbourne, Victoria, Australia.
authors.forename: W
authors.initials: W
authors.lastname: Wilson
authors.affiliation: Department of Cardiology, Royal Melbourne Hospital, Melbourne, Victoria, Australia.
authors.forename: J
authors.initials: J
authors.lastname: Morton
authors.affiliation: Department of Cardiology, Royal Melbourne Hospital, Melbourne, Victoria, Australia.
authors.forename: A
authors.initials: A
authors.lastname: Aggarwal
mesh_terms: D006328:Cardiac Catheterization; D009202:Cardiomyopathies / Q000000981:diagnostic imaging*; D000072226:Computed Tomography Angiography; D004417:Dyspnea / Q000209:etiology; D017548:Echocardiography, Transesophageal; D006344:Heart Septal Defects, Atrial / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D006976:Hypertension, Pulmonary; D000860:Hypoxia; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D017180:Tachycardia, Ventricular / Q000175:diagnosis
keywords: atrial septal defect; cardiomyopathy; hypoxia; ventricular tachycardia