Author/Authors :
Xie، نويسنده , , Feng and Tsutsui، نويسنده , , Jeane M. and McGrain، نويسنده , , Anna C. and DeMaria، نويسنده , , Anthony and Cotter، نويسنده , , Bruno and Becher، نويسنده , , Harald and Lebleu، نويسنده , , Curtis and Labovitz، نويسنده , , Arthur and Picard، نويسنده , , Michael H. and O’Leary، نويسنده , , Edward L. and Porter، نويسنده , , Thomas R.، نويسنده ,
Abstract :
In a pilot study of 27 patients, those who presented with chest pain underwent 2 dobutamine stress echocardiographic studies, 1 with high mechanical index harmonic imaging to analyze wall motion without contrast and 1 with real-time low mechanical index perfusion imaging with intravenous Optison to assess myocardial perfusion and wall motion. All patients then underwent quantitative coronary angiography. Two independent reviewers demonstrated an improvement in sensitivity when analyzing myocardial perfusion. In the 21 patients who had significant coronary stenoses, 14 had abnormal myocardial perfusion detected at peak stress and 7 had abnormal wall motion detected by standard dobutamine stress echocardiography. There was decreased specificity with perfusion imaging by 1 reviewer. The addition of real-time perfusion imaging after intravenous contrast during dobutamine stress echocardiography has the potential to improve detection of coronary artery disease.
