Symptoms for Acute Onset of Severe Myocarditis. While there are several contributing factors that may lead to myocarditis, the primary cause is viral. Myocarditis usually results from the Coxsackie B virus, and may also result from measles, influenza, chicken pox, hepatitis virus, or the adenovirus in children. If an acute onset of severe myocarditis occurs, a patient may display the following symptoms:
Medical Definition of toxic. 1  1: containing or being poisonous material especially when capable of causing serious injury or death toxic drugs toxic gas. 2  2: of, relating to, or caused by a poison or toxin toxic liver damage. 3  3a: affected by a poison or toxinb: affected with toxemia of pregnancy toxic pregnant women.
Poisonous ââ describes substances that will disturb organisms, usually in a harmful way. Poison implies a high level of toxicity, though any substance is technically poisonous if taken in a large enough dose.