What is the reason for the sudden fainting?

Syncope is caused by various reasons, such as transient cerebral ischemia and sudden and brief loss of consciousness, which is called syncope in medicine. Under special circumstances, syncope in normal people is a physiological phenomenon. However, if a person often syncope suddenly or the elderly have syncope, it may be pathological syncope, so be sure to go to the hospital for examination.

Vasovagal syncope

This disease is the most common, especially in young people, and often has fixed incentives, such as urination, cough, pain, emotional tension, fear, sultry weather, strenuous exercise, fasting and so on. Sometimes there is no symptom before syncope attack, and it recovers quickly after attack without sequelae, and sometimes blood pressure and/or heart rate slow down. This syncope is usually cured by special exercise under the guidance of a doctor, and a few people need drugs or pacemakers for treatment.

Cardiogenic syncope

It refers to syncope caused by sudden decrease or suspension of cardiac output caused by heart disease, which is mostly caused by arrhythmia and organic heart disease. Common arrhythmia is caused by bradycardia or cardiac arrest such as sick sinus syndrome and atrioventricular block, while tachycardia arrhythmia such as ventricular fibrillation and tachycardia leads to decreased cardiac output and syncope.

Organic heart diseases, such as acute myocardial infarction, cardiac myxoma, obstructive hypertrophic cardiomyopathy and congenital cyanotic heart disease, can cause syncope. Cardiogenic syncope is common in middle-aged and elderly people, which lasts for a long time and is in a dangerous state. Middle-aged and elderly people should communicate with cardiovascular experts to treat heart disease, and use pacemakers and implantable cardioverter defibrillator (ICD) if necessary.

Cerebral syncope

It is due to the circulatory disorder of cerebral blood vessels or blood vessels that mainly supply blood to the brain, which leads to temporary widespread cerebral blood supply insufficiency. More common in the elderly, the common causes are transient cerebral ischemia, brain stem syncope, Takayasu arteritis and so on. Preventive measures are to prevent cerebral arteriosclerosis, reduce cerebral vasospasm, take drugs regularly and review regularly.

Hypotension syncope in upright position

More common in the elderly or bedridden for a long time. After a sudden change of body position, blackness and syncope appeared at the moment. The preventive measure is to stand or lift things slowly, and don't squat for a long time.

In short, there are many reasons for syncope, vasovagal is the most common and cardiogenic syncope is the most dangerous. During the attack, the syncope should be placed in supine position or lower limb elevation position, which can increase cerebral blood flow. Loosen the neckline and turn your head to one side. Send the patient to the hospital in time, and choose to do ECG, echocardiography, head CT, blood sugar, tilt table test and other examinations according to different situations, and prevent recurrence under the guidance of doctors after determining the cause.

Young people? Vasovagal syncope is the most common.

Syncope is mostly caused by cerebral ischemia and hypoxia, especially in young people.

Most of the causes of the attack are related to the dysfunction of pressure sensing conduction, such as urination, cough, pain, emotional tension, fear, sultry weather, strenuous exercise and fasting. Sometimes there is no symptom before syncope, but it will recover quickly without sequelae, and sometimes blood pressure or heart rate slows down. Under the guidance of doctors, most people can be cured by special exercise, and a few people need drugs or pacemakers.

Upright training can prevent and treat vasovagal syncope. Patients can stand against the wall for 30-40 minutes every day, 1-2 times a day, and pay attention to supplement the intake of salt and water to increase blood volume, thus enhancing the tolerance of upright posture. This kind of training is very effective for some patients with vasovagal syncope. Symptoms may recur after stopping training, but syncope can be effectively prevented after resuming training.

Old people? Cardiogenic syncope and cerebral syncope are common.

Cardiogenic syncope and cerebral syncope are common syncope phenomena in the elderly.