夏日高温如何影响你的心脏

This is why you should be careful when temps rise if you 有心脏问题.

High temperatures 和 humidity may make you feel sweaty, clammy 和 downright uncomfortable. 对大多数人来说, this is just a minor annoyance that's the price to pay for enjoying outdoor activities when the weather is warm. 但如果你有心脏病, it may be harder for you to h和le the heat or to cool down when temps rise.

如果你不能保持身体凉爽, it increases your risk for heat-related illnesses such as heat exhaustion or heat stroke. Although anyone can experience these serious health issues, people with heart disease are at greater risk. That's because your heart plays a big role in helping your body keep cool. When temperatures rise, your heart has to work harder. If your heart isn't functioning optimally, it puts a strain on your cardiovascular system 和 makes it harder to stay cool.

Here are answers to common questions about the connection between your heart 和 your body's ability to h和le hot weather.

Why is it harder for your body to cool down if you have heart disease?

天气热的时候, your heart may need to circulate 2 - 4 times as much blood a minute as it does on a cool day. People with weakened hearts may not respond to the heat as well as people with healthy hearts 和 may have a harder time keeping cool. Narrowed arteries can limit blood flow to the skin 和 a damaged heart may not pump enough blood to effectively transfer heat from your body.

Can heart medications affect how your body responds to the heat?

受体阻滞剂等药物, Ace受体抑制剂, calcium channel blockers 和 diuretics may make your body more sensitive to heat. Some lower your hydration level or slow your heart rate, which reduces how quickly your heart can circulate blood. 如果你服用这些药物, 有心脏问题, 超重或超过50岁, you may need to take special precautions when temps soar.

If you feel dizzy when it's hot, is it caused by your heart?

Your heart has to increase the amount of blood flowing to your skin when it's hot to keep your body cooler. This may reduce blood flow to the brain. You also lose sodium 和 potassium in addition to water when you sweat. This combination may lower your blood pressure quickly, which can cause 头晕. 如果你感到头晕或晕眩, rest in a cool place with your legs up 和 drink non-alcoholic 和 non-caffeinated beverages like water or fruit juice.

What are the signs of heat exhaustion or heat stroke?

People with heart disease are more at risk for heat exhaustion 和 heat stroke. Signs of heat exhaustion include heavy sweating, 皮肤冰冷潮湿, 头晕, 快速但微弱的脉冲, 弱点, 头痛, 肌肉痉挛, 恶心想吐, 呕吐和深色尿液. If you notice any of these symptoms, stop what you're doing 和 move to a cooler place 和 rest. Drink water or other non-caffeinated 流感ids. Use cool compresses to cool down your body or take a cool shower or bath. If you don't feel better after taking steps to cool down, seek medical attention. Heat stroke is a medical emergency (call 911) 和 includes symptoms such as high body temp (103^oF或更高), 热红皮肤, 快而强的脉冲, 头晕, 恶心想吐, 混乱, headache 和 possible loss of consciousness.