title: Are intraventricular gradients with dobutamine a cause of false positive treadmill stress tests?
abstract: An asymptomatic 40-year-old man with no conventional risk factors for coronary artery disease had a positive treadmill stress test based on ECG criteria. Coronary CT angiography showed a small plaque in the left anterior descending artery and dobutamine-atropine stress echocardiography was negative for myocardial ischemia but showed a significant outflow gradient (100 mmHg) during pharmacological stress.
authors.affiliation: Departamento de Imagiologia Cardíaca, Serviço de Cardiologia do Hospital da Luz, Lisboa, Portugal.
authors.forename: Nuno
authors.initials: N
authors.lastname: Cardim
authors.forename: Pedro
authors.initials: P
authors.lastname: Campos
authors.forename: Daniel
authors.initials: D
authors.lastname: Ferreira
authors.forename: Vanda
authors.initials: V
authors.lastname: Carmelo
authors.forename: Marisa
authors.initials: M
authors.lastname: Trabulo
authors.forename: Teresa
authors.initials: T
authors.lastname: Santos
authors.forename: Adelaide
authors.initials: A
authors.lastname: Almeida
authors.forename: Cristina
authors.initials: C
authors.lastname: Prata
authors.forename: Sylvie
authors.initials: S
authors.lastname: Mariana
authors.forename: F Pereira
authors.initials: FP
authors.lastname: Machado
authors.forename: José
authors.initials: J
authors.lastname: Roquette
mesh_terms: D000328:Adult; D002316:Cardiotonic Agents; D004280:Dobutamine; D005080:Exercise Test; D005189:False Positive Reactions; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male
chemical_list: D002316:Cardiotonic Agents; D004280:Dobutamine