Many middle-aged and elderly individuals experience dizziness when rising from a sofa, upon waking, or even when getting up from the toilet. Symptoms include lightheadedness, weakness, unsteadiness, and blurred vision. The immediate assumption is often elevated blood pressure.However, research from the University of North Carolina reveals that many people experience sudden darkness before their eyes and dizziness when rising abruptly from a seated position. This is actually a medical condition known as orthostatic hypotension.
Over 30% of Seniors Experience Orthostatic Hypotension
Orthostatic hypotension, also known as postural hypotension, occurs when systolic blood pressure drops by more than 20 mmHg after suddenly standing from a lying or squatting position, accompanied by noticeable dizziness, blurred vision, fatigue, nausea, and palpitations. Wu Zhaohui, Director of Cardiovascular Medicine at the Guangdong Armed Police Corps Hospital, explains thatUnder normal circumstances, when a person changes position from lying down to standing, blood pooling in the abdomen and lower limbs due to gravity causes a slight drop in blood pressure, typically a decrease of 5-10 mmHg in systolic pressure. However, if autonomic nervous system dysfunction leads to impaired vasomotor regulation, the blood pressure drop can be more significant, reaching or exceeding 20 mmHg and resulting in pronounced hypotensive symptoms.Recent clinical studies and epidemiological investigations have revealed a close association between orthostatic hypotension and conditions such as stroke and myocardial infarction, leading to increased attention on this condition. Wu Chaohui noted, "Orthostatic hypotension is common among the elderly and children. Statistics show that approximately 15% of individuals over 65 years old experience orthostatic hypotension, while the prevalence rises to 30%-50% among those over 75."Orthostatic hypotension is classified into primary and secondary types. Primary cases are often caused by autonomic nervous system dysfunction leading to impaired upright small artery constriction; secondary cases are commonly seen in chronic malnutrition or following the use of antihypertensive or sedative medications.
Hypertensive patients should rise slowly in the morning
Sudden changes in posture or taking antihypertensive drugs can cause rapid blood pressure drops, significantly increasing the risk of cerebral ischemia. This warrants high vigilance among hypertensive patients!
When hypotension occurs, dizziness often arises upon standing, sometimes accompanied by mild headache, nausea, or unsteadiness. Severe cases may result in fainting. Orthostatic hypotension is more likely during nighttime bathroom visits, early morning rising, and physical activity, with the transition from lying to standing being particularly pronounced.Elderly individuals often experience carotid artery hardening, which can also trigger episodes when turning the head. Wu Zhaohui explains that this is primarily caused by reduced cerebral blood flow due to low blood pressure.
Frequent episodes of orthostatic hypotension can induce dizziness, weakness, emotional distress, and depression. Experts advise hypertensive patients to monitor blood pressure in different positions at home for accurate diagnosis and tailored treatment. Additionally, patients are encouraged to enhance physical fitness, use appropriate tonic medications, and avoid drugs that elevate blood pressure whenever possible.
Tips for Preventing Hypotension Through Daily Habits
(1) Elderly individuals must rise slowly from bed or seated positions, following the "three 1-minute" method: after waking, lie still with eyes open for 1 minute; sit with feet dangling over the bedside for 1 minute; hold onto the bedside rail while standing for 1 minute. Only then should they move slowly. Avoid sudden standing. If dizziness occurs after standing, remain lying down to rest.
(2) After taking blood pressure medication, nighttime bathroom trips are most likely to trigger orthostatic hypotension. Therefore, extra care should be taken to follow the three "1-minute" steps when getting up at night.
(3) Factors such as heavy sweating, hot baths, diarrhea, colds, and alcohol consumption can all trigger orthostatic hypotension and should be avoided.
(4) For long-term bedridden patients and elderly individuals with hypertension, rising or getting out of bed should be done slowly. Performing light preparatory limb exercises helps promote venous blood return to the heart. Crossing your legs while standing can also aid in increasing blood pressure.