There are three main types of volcano-composite or strato, shield and dome. Composite Volcanoes. Composite volcanoes, sometimes known as strato volcanoes, are steep sided cones formed from layers of ash and [lava] flows. The eruptions from these volcanoes may be a pyroclastic flow rather than a flow of lava.
A vagal episode or vasovagal response or vasovagal attack (also called neurocardiogenic syncope) is a malaise mediated by the vagus nerve. When it leads to fainting, also known as a syncope, it is called a vasovagal syncope, which is the most common type of fainting.
1 The vasovagal reflex, which causes the heart rate to slow and the blood vessels to widen, or dilate. 2  As a result, blood pools in the lower body and less blood goes to the brain. 3  This reflex can be triggered by many things, including stress, pain, fear, coughing, holding your breath, and urinating.