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.
Vasovagal Syncope. Vasovagal syncope (also called cardioneurogenic syncope) is a temporary loss of consciousness caused by a neurological reflex that produces either sudden dilation of the blood vessels in the legs, or a very slow heart rate (bradycardia), or both. Vasovagal syncope accounts for more than half of all episodes of syncope.