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.
Production of VX began in 1961; although it is less volatile than tabun or sarin, it is more toxic. Aerosols of VX are deadly and it can also be absorbed through the skin. There were over 3000 fatalities on one occasion when VX was tested, but fortunately these casualties were sheep.