Fig. 3From: Vasoresponsiveness in patients with heart failure (VASOR): protocol for a prospective observational studySummary of the three mechanisms contributing to vasodilatory shock: Activation of adenosine triphosphate (ATP) dependent potassium channels (KATP), activation of inducible nitric oxide synthase (iNOS) and arginine vasopressin (AVP) deficiency. Adapted from Landry and Oliver [10]Back to article page