Are intraventricular gradients with dobutamine a cause of false positive treadmill stress tests?
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.
Cardim
Nuno
N
Departamento de Imagiologia Cardíaca, Serviço de Cardiologia do Hospital da Luz, Lisboa, Portugal.
Campos
Pedro
P
Ferreira
Daniel
D
Carmelo
Vanda
V
Trabulo
Marisa
M
Santos
Teresa
T
Almeida
Adelaide
A
Prata
Cristina
C
Mariana
Sylvie
S
Machado
F Pereira
FP
Roquette
José
J
D000328:Adult; D002316:Cardiotonic Agents; D004280:Dobutamine; D005080:Exercise Test; D005189:False Positive Reactions; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male
D002316:Cardiotonic Agents; D004280:Dobutamine