Continuous wave Doppler echocardiographic evaluation of cardiac output and its applications to treadmill exercise

To evaluate the clinical usefulness of Doppler-derived cardiac output and the effect of altered left ventricular function during maximal treadmill exercise, this study was performed using continuous wave (CW) Doppler technique through the suprasternal notch acoustic window. Subjects consisted of 22 patients with coronary artery disease (study 1) and 21 healthy male volunteers (study 2)