The Diagnosis of Myocardial Infarction Free Essay Example, 2000 words

In the history of nausea experienced by McCaffery, Nausea is a feeling of vomiting which gets initiated, in the brain part called the vomiting center which is a complex array of neurons coordinated by the central pattern generator. The vomiting center receives an input from the chemoreceptor trigger zone, GI tract, and the cerebral cortex. In this case study the chemoreceptor trigger zone, since chemicals such as increase of toxic substances in the blood and causes nausea to be experienced and initiates a vomit reflex. The brain detects the unusual rise of toxins in the body that constitutes a threat to life through two transmitters, such as, dopamine, which acts as D2 receptors and serotonin which acts as 5HT3 receptors (American Heart Association, 2009). Similarly, the gastrointestinal tract (GI) gets involved in inducing a vomit because it is a source of toxin absorption (Wiviott, 2012). Chemoreceptors in the gut meditate the toxic effect of some chemotherapeutic agents like cisp latin. Nausea and vomiting get triggered through vagal nerve efferent and fibers associated with the sympathetic nervous system. Receptors get stimulated by neurotransmitters such as serotonin, histamine, and acetylcholine (Wiviott, 2012). We will write a custom essay sample on The Diagnosis of Myocardial Infarction or any topic specifically for you Only $17.96 $11.86/page Therefore, in this case of McCaffery, the myocardial infarction causes lack of enough blood reaching the brain and failure to remove toxic substances from the body. This leads to accumulation of toxic substances in the body such as carbon dioxide then the neurotransmitters convey this message to the brain and so a feeling of nausea is initiated on McCaffery.