Local dimensional changes of the myocardium measured by ultrasonic technique.
D000818:Animals; D001783:Blood Flow Velocity; D002306:Cardiac Volume; D004285:Dogs; D004553:Electric Conductivity; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology*; D006339:Heart Rate; D006352:Heart Ventricles; D008722:Methods; D009119:Muscle Contraction; D009210:Myofibrils; D014465:Ultrasonics