Supine bicycle versus post-treadmill exercise echocardiography in the detection of myocardial ischemia: a randomized single-blind crossover trial.

Objectives: We sought to determine the comparative accuracy of supine bicycle exercise echocardiography (SBE) and posttreadmill exercise echocardiography (TME) in detecting myocardial ischemia in patients with known or suspected coronary artery disease (CAD).

Background: Supine bicycle echocardiography and TME have been used for evaluation of CAD. However, the comparative accuracy of these modalities in the detection of ischemia in the same patients is not known.

Effects of adenosine on left ventricular filling dynamics in patients with and without coronary artery disease: a Doppler echocardiographic study.

Objectives: Adenosine, a potent coronary vasodilator is used as a pharmacologic stress agent for the assessment of coronary artery disease. A paucity of data exists on its effects on filling dynamics. Accordingly, this study was undertaken to evaluate the effects of adenosine on left ventricular filling as assessed by Doppler echocardiography.

Application of the continuity equation and valve resistance to the evaluation of St. Jude Medical prosthetic aortic valve dysfunction.

Doppler echocardiography was applied to the assessment of patients with surgically documented St. Jude medical aortic valve dysfunction. Derivation of effective orifice area and Doppler velocity index with the continuity equation and calculation of valve resistance accurately differentiated stenotic from regurgitant and normal valves.

Serial changes in response of hibernating myocardium to inotropic stimulation after revascularization: a dobutamine echocardiographic study.

Objectives: We sought to evaluate the serial changes in the response of the hibernating myocardium to dobutamine stimulation after revascularization.

Background: An improvement in myocardial contraction during dobutamine stress echocardiography (DSE), particularly a biphasic response, predicts recovery of rest function. However, little is known about the changes in the response of the myocardium to dobutamine after revascularization.