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.
What to Know About VX Nerve Agent, the Deadly Substance That Killed Kim Jong Nam. Malaysian police have said that a substance called VX Nerve Agent was found on Kim Jong Nam's eye and his face after he was fatally attacked at Kuala Lumpur airport on Feb. 13.