Figure 2From: Dobutamine stress echocardiography for assessing the role of dynamic intraventricular obstruction in left ventricular ballooning syndrome Moderate dobutamine-induced obstruction. Moderate dobutamine-induced dynamic LV obstruction (peak velocity 3 m/sec corresponding to a gradient of 36 mm Hg) caused by the iuxtaposition of the posterior papillary muscle to the hypertrophic septum in another patient with apical ballooning.Back to article page