With the high temperature in summer, it has become the norm to sweat profusely within a few minutes of going out. However, in addition to making the body feel sticky and uncomfortable, “sweating” may also hide a cardiovascular crisis.
Dr. Lin Junren, Physician, Department of Cerebrovascular, Neurology Center, Taipei Veterans General Hospital, said that most people know that cold weather can constrict blood vessels and increase the risk of cardiovascular disease, but few people know that studies have pointed out that high temperature may also cause stroke hazards. .
Dehydration in hyperlipidemia patients may lead to stroke elders or those with a history of cardiovascular disease should drink more water
Only cold or hot weather will not directly lead to cardiovascular disease. Extreme changes in temperature are the key. Luo Yanyu, director of the Neurology Department of Hualien Tzu Chi, said with a smile, “Otherwise, the equatorial countries and the North and South Pole should have the most strokes.” From a physiological point of view, a sudden rise or drop in temperature can stimulate the sympathetic nerves, increase the heart rate or blood pressure, and induce cardiovascular disease.
In addition, in summer, it is easy to sweat, and the water in the body decreases. In the case of dehydration, it is easy to thicken the blood. If it is combined with risk factors such as high blood lipids, it will lead to blood vessel blockage and increase the probability of stroke. “If the blood vessels themselves are in good condition.
“In theory, mild dehydration is not a problem, but when dehydration occurs in patients with cardiovascular disease, the risk of ischemic stroke increases.”
Dr. Lin Junren also reminded that the hot weather has a greater impact on the elderly over 65 years old. The elders in the family should add more water in the high temperature environment. People with a history of cardiovascular disease should strictly prevent heat stroke and manage the risk of stroke.
70 -year-old man suspected of temporary cerebral ischemia caused by dehydration
Dr. Lin Junren shared that he had previously met a 70-year-old male patient with hyperlipidemia. He had carotid artery stenosis for a long time. One summer afternoon, he went to the field to grow vegetables. When he returned home, he found that things would fall off when he took things in his left hand, and he even broke when he was eating. bowl, and it was back to normal after half an hour.
“It should be that his body was dehydrated, the body’s water was excessively lost, and the cerebral blood flow became thick, which induced temporary ischemia. Although the follow-up symptoms recovered, temporary cerebral ischemia is one of the precursors of ischemic stroke. It is best to treat it as a stroke with caution.” Dr. Lin Junren suggested that once a similar event occurs, the doctor should be proactively informed to confirm whether a more aggressive treatment method is required.
At present, aspirin is the most commonly used antiplatelet drug for stroke prevention in clinic. However, long-term use may lead to side effects of gastrointestinal bleeding such as gastric ulcer and gastric bleeding. Change to other treatment options that take into account both efficacy and safety as appropriate.
Patients with hyperlipidemia should avoid stroke from the source , the lower the LDL cholesterol, the better
Director Luo Yanyu said that the risk factors of ischemic stroke can be divided into two categories, one is the risk factor that cannot be changed, for example, the higher the age, the higher the chance of stroke; the other is the risk factor that can be changed, including hyperlipidemia , smoking, obesity, etc., among which low-density cholesterol is a key factor in high blood lipids that is considered to affect the occurrence of cerebrovascular and cardiovascular diseases.
If you find that the low-density cholesterol value is high, you should actively control it with medication to avoid myocardial infarction or stroke from the source.Studies have shown that for every 1% reduction in LDL cholesterol, the relative risk of cardiovascular disease can be reduced by 1-1.5%. Dr. Luo Yanyu pointed out that if people are unable to reach the target value with oral drug treatment, or are intolerant to side effects Yes, you can discuss with your doctor whether you can switch to cholesterol-lowering injections. “Actually, injections are a big breakthrough in recent years. I have encountered several patients with very poor vascular conditions.
After using oral drugs and cholesterol-lowering injections together, they have successfully reduced their blood pressure. Density cholesterol is reduced to about 16mg/dL, if people’s financial ability permits, it is recommended to reduce the value as much as possible, and the protection of cardiovascular and cerebrovascular is better.”