What causes low blood pressure?
Dec 03, 2022
Source: Cainiu Health
Dr. Tian Hongbo
Introduction
Low diastolic blood pressure usually refers to a lower-than-normal diastolic reading in blood pressure. It may be caused by factors such as weak constitution, excessive medication dosage, aortic valve insufficiency, arteriosclerosis in the elderly, or acute myocardial infarction. Treatment should be based on the specific underlying cause. In addition to these common causes, it could also result from myocardial ischemia, heart failure, and other conditions.
Low diastolic blood pressure usually refers to a lower-than-normal level in the diastolic component of blood pressure. It may be caused by factors such as poor physical constitution, excessive medication dosage, aortic valve insufficiency, senile arterial sclerosis, or acute myocardial infarction. Treatment should be based on specific circumstances. Detailed explanations are as follows:
1. Poor Physical Constitution
If someone habitually eats a one-sided diet, neglects healthy lifestyle habits, and has low immunity, their overall constitution may become weak. This can lead to symptoms such as poor mental state or fatigue, possibly triggering low diastolic blood pressure. Appropriately increasing physical activity—such as walking or jogging—can promote blood circulation and help improve physical health.
2. Excessive Medication Dosage
In patients with pre-existing hypertension, taking an excessive dose of antihypertensive medication may lead to low blood pressure due to drug effects. This is especially common among newly diagnosed hypertensive patients who may struggle to determine the appropriate dosage when first starting treatment. Reducing the medication dosage under medical supervision can help alleviate this condition.
3. Aortic Valve Insufficiency
When the aortic valve fails to close properly, some blood may flow backward into the heart during ventricular diastole, potentially causing low diastolic blood pressure. Under medical guidance, vasodilators such as sodium nitroprusside for injection or hydralazine hydrochloride tablets may be prescribed.
4. Senile Arterial Sclerosis
In elderly individuals, atherosclerosis may cause stiffening of blood vessels. Reduced vascular elasticity can result in low diastolic blood pressure. For patients with long-standing and severe arterial sclerosis, drug therapy may not yield satisfactory results. In such cases, timely surgical intervention at a正规 hospital is recommended.
5. Acute Myocardial Infarction
After an acute myocardial infarction, the number of cardiac muscle cells involved in heart contraction decreases, which may lead to hypotension. In such cases, patients may take medications such as nitroglycerin tablets or isosorbide mononitrate tablets as directed by a physician to improve their condition.
Besides the above common causes, low diastolic pressure may also result from conditions such as myocardial ischemia or heart failure. It is recommended to seek medical evaluation at a hospital to determine the underlying cause before initiating treatment.
