Acute viral myocarditis, known medically as myocarditis, is one of the most dangerous complications of vomiting and diarrhea. Some cases of vomiting and diarrhea can be caused by viruses. The most common virus that causes myocarditis is enterovirus, known as Coxsackievirus, which can directly enter myocardial cells and cause damage, or produce certain harmful substances that damage myocardial cells, leading to myocardial degeneration. It can also affect the pericardium and endocardium. If it invades the heart's pacemaker system, it can be life-threatening.
Cerebrovascular accidents are an overlooked complication that can cause elderly people to die from acute vomiting and diarrhea. During vomiting and diarrhea, a large amount of water and sodium, potassium, calcium, and magnesium ions are excreted from the body through feces. The loss of water puts the body in a state of dehydration, reduces blood volume, increases blood viscosity, slows down blood flow, and is prone to form thrombi that block blood vessels. This can lead to coronary artery blockage causing angina and myocardial infarction, and cerebral vascular blockage causing ischemic stroke. Sodium, potassium, calcium, and magnesium are important cations in the body. In addition to maintaining acid-base balance in the blood, they play a crucial role in maintaining nerve conduction function and heart rate rhythm. Deficiency can cause serious arrhythmias and sudden death.
During hypoglycemia caused by vomiting and diarrhea, appetite usually decreases, leading to insufficient food intake. At this time, it is necessary to break down stored glycogen in the body to maintain blood glucose stability. However, elderly people do not have enough stored glycogen to be converted into blood glucose. When blood glucose levels drop, elderly people are more prone to fatigue, sweating, palpitations, pale complexion, and syncope, a series of symptoms of hypoglycemia. The normal blood glucose concentration is 3.9~6.2 mmol/L. When the blood glucose concentration is below 3.0 mmol/L, mental symptoms may occur even leading to coma, often causing sudden death.
Dehydration and acidosis are the main causes of death in acute vomiting and diarrhea. Normally, carbon dioxide produced by metabolic processes in the body is exhaled through respiration, while other waste products need to be transported by water and excreted from the body through the kidneys as urine. When dehydrated, the urine volume decreases due to the loss of body water, and in severe cases, there may be no urine. This will reduce the excretion of waste products produced by the body's metabolism and accumulate them in the body, causing symptoms of poisoning in the body. In addition to changes in respiration, symptoms such as fatigue, weakness, and neurological symptoms may also occur.
After vomiting and diarrhea due to recurrent stomach problems, the body's digestive function gradually decreases, and the intestinal resistance to diseases also weakens, increasing the burden on gastrointestinal function and often leading to the recurrence of stomach problems.