Evaluation of Myocardial Viability by Means of Low-Dose Dobutamine Gated SPECT (the DOGS Study)
Viability assessment remains a clinical challenge in patient with coronary artery disease and left ventricular dysfunction. Several imaging modalities are available for evaluating myocardial viability, based either on perfusion or on contractile reserve analysis. Briefly, perfusion analysis is highly sensitive and contractile reserve highly specific. A combined analysis of both perfusion and contractile reserve has been proposed to improve the diagnostic accuracy in patient referred for a revascularization procedure. However, the value of this combined analysis has not been validated in unselected patients referred for viability assessment.
The patients enrolled in the study will undergo a nitrate enhanced rest gated SPECT using a Tc-99m labeled tracer (sestamibi or tetrofosmine) followed by a second gated SPECT acquired during a low-dose dobutamine infusion (10 mcg/kg/mn). All patients will have a 6-month clinical and imaging follow-up, including physical examination and a nitrate enhanced rest gated SPECT using the same radiopharmaceutical. All treatments received during this 6-month period will be recorded, including medical therapy and coronary revascularization (angioplasty, stenting and CABG).
Finally, the value of baseline perfusion and contractile reserve analysis in predicting left ventricular ejection fraction changes at 6-month follow-up will be evaluated.
Heart Failure, Congestive
|Study Design:||Time Perspective: Prospective|
|Official Title:||Prediction of Left Ventricular Function Changes Using Low Dose Dobutamine Gated SPECT in Patients Referred for Viability Assessment: The DOGS (DObutamine Gated Spect)Study.|
|Brussels, Belgium, B 1090|
|Bobigny, France, 93009|
|CHU de Brest|
|Brest, France, 29200|
|University Hospital of Caen|
|Caen, France, 14000|
|Corbeil, France, 91100|
|University Hospital of Nancy|
|Nancy, France, 54037|
|Hopital Européen Georges Pompidou|
|Paris, France, 75908|
|University Hospital of Rouen|
|Rouen, France, 76031|
|Study Chair:||Alain Manrique, MD||University Hospital, Rouen|
|Study Director:||Pierre-Yves Marie, MD||University Hospital of Nancy|
|Study Director:||Philippe Franken, MD||Free University of Brussels|