WebMD Symptom Checker helps you find the most common symptom combinations and medical conditions related to palpitations (fluttering in chest). Click on the combination that matches your symptoms to find the conditions that may cause these problems.
Nerve agents are a class of phosphorus-containing organic chemicals (organophosphates) that disrupt the mechanism by which nerves transfer messages to organs. The disruption is caused by blocking acetylcholinesterase, an enzyme that normally destroys acetylcholine, a neurotransmitter.
VX is the deadliest nerve agent ever created. Known by its U.S. Army code name, it is a clear, colorless liquid with the consistency of motor oil. A fraction of a drop of VX, absorbed through the skin, can fatally disrupt the nervous system.