胰高血糖素是一种胰腺分泌的激素。它能激活腺苷酸环化酶。此酶可使双磷酸腺苷变为环一磷酸腺苷。给狗静脉注射胰高血糖素,可以增强心肌收缩力,其作用类似儿茶酚胺的作用。据判断胰高血糖素是直接作用于左心室收缩力。为了证实这一点,将产生微小的或无全身作用剂量 Glucagon is a hormone secreted by the pancreas. It activates adenylate cyclase. This enzyme can make adenosine diphosphate to cyclic adenosine monophosphate. Intravenous injection of glucagon to the dog, can enhance myocardial contractility, its role is similar to the role of catecholamines. It is judged that glucagon acts directly on left ventricular contractility. To confirm this, there will be little or no systemic dose