title: Doppler tissue imaging during supine and upright exercise in healthy adults.
abstract: Doppler tissue imaging variables were measured in 18 healthy men and women during supine bicycle stress exercise and upright exercise treadmill testing. From a color Doppler tissue imaging cineloop, tissue velocities in basal and mid segments of the standard 3 apical views during rest and peak exercise were assessed. Compared segments were adjusted for double product, and peak variables were compared using the paired t test. Peak systolic velocity and strain rate increased with both forms of exercise (P < .03). Time to compression-expansion crossover shortened in all segments with exercise and at peak exercise treadmill testing versus peak supine bicycle stress exercise (P < .03). Of all segments, 81% were analyzable for peak systolic velocity, 79% for strain rate. Doppler tissue imaging is a feasible tool for quantitatively assessing left ventricular response to supine and upright exercise.
authors.affiliation: Division of Cardiovascular Diseases, Mayo Clinic, Scottsdale, Arizona 85259, USA.
authors.forename: Christina S
authors.initials: CS
authors.lastname: Reuss
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Moreno
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Appleton
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Lester
mesh_terms: D000328:Adult; D018618:Echocardiography, Doppler, Color / Q000379:methods*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016683:Supine Position / Q000502:physiology*; D016276:Ventricular Function; D016277:Ventricular Function, Left / Q000502:physiology*