Placeholder Image

字幕列表 影片播放

  • Approximately 7 million people around the world die from heart attacks every year,

  • and cardiovascular disease,

  • which causes heart attacks and other problems like strokes,

  • is the world's leading killer.

  • So what causes a heart attack?

  • Like all muscles, the heart needs oxygen,

  • and during a heart attack, it can't get enough.

  • Fatty deposits, or plaques,

  • develop on the walls of our coronary arteries.

  • Those are the vessels that supply oxygenated blood to the heart.

  • These plaques grow as we age,

  • sometimes getting chunky,

  • hardened,

  • or enflamed.

  • Eventually, the plaques can turn into blockages.

  • If one of the plaques ruptures or cracks,

  • a blood clot will form around it in minutes,

  • and a partially closed artery can become completely blocked.

  • Blood flow is cut off to the cardiac muscle

  • and the oxygen-starved cells start to die within several minutes.

  • This is a myocardial infarction,

  • or heart attack.

  • Things can rapidly deteriorate in the absence of treatment.

  • The injured muscle may not be able to pump blood as well,

  • and its rhythm might be thrown off.

  • In the worst case scenario, a heart attack can cause sudden death.

  • And how do you know that someone is having a heart attack?

  • The most common symptom is chest pain

  • caused by the oxygen-deprived heart muscle.

  • Patients describe it as crushing or vice-like.

  • It can radiate to the left arm,

  • jaw,

  • back,

  • or abdomen.

  • But it's not always as sudden and dramatic as it is in the movies.

  • Some people experience nausea

  • or shortness of breath.

  • Symptoms may be less prominent in women and the elderly.

  • For them, weakness and tiredness may be the main signal.

  • And surprisingly, in many people,

  • especially those with diabetes, which affects the nerves that carry pain,

  • a heart attack may be silent.

  • If you think that someone might be having a heart attack,

  • the most important thing is to respond quickly.

  • If you have access to emergency medical services, call them.

  • They're the fastest way to get to a hospital.

  • Taking aspirin, which thins the blood,

  • and nitroglycerin, which opens up the artery,

  • can help keep the heart attack from getting worse.

  • In the emergency room, doctors can diagnose a heart attack.

  • They commonly use an electrocardiogram

  • to measure the heart's electrical activity

  • and a blood test to assess heart muscle damage.

  • The patient is then taken to a high-tech cardiac suite

  • where tests are done to locate the blockages.

  • Cardiologists can reopen the blocked artery

  • by inflating it with a balloon in a procedure called an angioplasty.

  • Frequently, they also insert a metal or polymer stent

  • that will hold the artery open.

  • More extensive blockages might require coronary artery bypass surgery.

  • Using a piece of vein or artery from another part of the body,

  • heart surgeons can reroute blood flow around the blockage.

  • These procedures reestablish circulation to the cardiac muscle,

  • restoring heart function.

  • Heart attack treatment is advancing,

  • but prevention is vital.

  • Genetics and lifestyle factors both affect your risk.

  • And the good news is that you can change your lifestyle.

  • Exercise, a healthy diet, and weight loss

  • all lower the risk of heart attacks,

  • whether you've had one before or not.

  • Doctors recommend exercising a few times a week,

  • doing both aerobic activity and strength training.

  • A heart-healthy diet is low in sugar and saturated fats,

  • which are both linked to heart disease.

  • So what should you eat?

  • Lots of fiber from vegetables,

  • chicken and fish instead of red meat,

  • whole grains and nuts like walnuts and almonds

  • all seem to be beneficial.

  • A good diet and exercise plan can also keep your weight in a healthy range,

  • which will lower your heart attack risk as well.

  • And of course, medications can also help prevent heart attacks.

  • Doctors often prescribe low-dose aspirin, for example,

  • particularly for patients who've already had a heart attack

  • and for those known to be at high risk.

  • And drugs that help manage risk factors,

  • like high blood pressure, cholesterol, and diabetes,

  • will make heart attacks less likely, too.

  • Heart attacks may be common, but they don't have to be inevitable.

  • A healthy diet,

  • avoiding tobacco use,

  • staying fit,

  • and enjoying plenty of sleep and lots of laughter

  • all go a long way in making sure your body's most important muscle

  • keeps on beating.

Approximately 7 million people around the world die from heart attacks every year,

字幕與單字

影片操作 你可以在這邊進行「影片」的調整,以及「字幕」的顯示

B2 中高級 美國腔

心臟病發作期間會發生什麼?- Krishna Sudhir (What happens during a heart attack? - Krishna Sudhir)

  • 144 17
    Jerry shiu 發佈於 2021 年 01 月 14 日
影片單字