Lower blood pressure may be caused by physiological factors or pathological factors. Physiological lowering of blood pressure can be seen in young women and the elderly, postural hypotension, etc. Pathological lowering of blood pressure can be seen in tachyarrhythmia, hypothyroidism, hypovolemia, myocardial infarction and so on.
1. Physiological factors: such as thin and weak young women and the elderly often have low blood pressure without obvious symptoms, and postural hypotension due to rapid positional changes, which can easily lead to dizziness, blackout and other symptoms of lowered blood pressure.
2. Tachyarrhythmia: The heart rate is accelerated during the onset of tachyarrhythmia such as supraventricular tachycardia, atrial fibrillation, etc., which may lead to the reduction of ventricular filling time, insufficient ventricular filling, and reduction of cardiac output, which may lead to the lowering of the patient’s blood pressure.
3. Hypothyroidism: the lack of thyroid hormone in patients with hypothyroidism reduces the sympathetic excitability, which weakens the contraction ability of the heart muscle, slows down the heart rate, and causes a decrease in cardiac output, which can lead to a decrease in the patient’s blood pressure.
4. Insufficient blood volume: such as severe diarrhea or vomiting, gastrointestinal bleeding, etc. may cause the body’s circulating blood volume is insufficient, which may lead to the patient’s blood pressure decrease.
5. Myocardial infarction: When myocardial infarction occurs in patients, it is easy to cause myocardial contraction ability to decline, cardiac output decreases, which leads to a decrease in blood pressure.
Reduced blood pressure may also be related to allergic reactions and other factors, it is recommended that patients go to regular hospitals in a timely manner to find out the causes of reduced blood pressure, standardized treatment under the guidance of the doctor, so as to avoid delays in the condition of the adverse consequences.