Fainting can occur in people of any age, but dangerous causes of fainting are more common among older people. Normally, the body quickly increases the heart rate and constricts blood vessels to maintain blood pressure. Heart valve disorders most commonly, the aortic valve. It's important to identify the cause of syncope, if possible, to rule out a dangerous heart condition. Doctors first ask questions about the person's symptoms and medical history. A person who is breathing should remain lying down.
Heart valve disorders, such as aortic stenosismitral stenosisor failure of an artificial heart valve.
They also ask about symptoms that occurred immediately before or after the event, including whether the person felt light-headed or dizzy or experienced nausea, sweating, blurred or tunnel vision, tingling of lips or fingertips, chest pain, or palpitations. Orthostatic upright hypotension low blood pressure when standing can also cause fainting because blood has trouble going against gravity to reach the brain. Aortic valve stenosisa narrowing of the valve between the heart and the aorta. They ask whether the person was exercising, arguing, or in a potentially emotional situation. The events often occur at night or after awaking.