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Ejection fraction: An important heart test - Mayo Clinic

Jan 29, 2025 · Ejection fraction is a measurement of the percentage of blood leaving the heart each time it squeezes. When the heart squeezes, it's called a contraction. Ejection fraction is just one of many tests you...

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Contact us - Mayo Clinic

Addresses, phone numbers and electronic contact form for Mayo Clinic campuses in Arizona, Florida and Minnesota.

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射血分数:重要的心脏检查 - 妙佑医疗国际 - Mayo Clinic

May 10, 2025 · 左心室(LV)射血分数约 50% 至 70% 为正常。 LV 射血分数轻度降低通常介于 41% 至 49% 之间。 LV 射血分数降低通常是在 40% 或以下。 即使射血分数正常,整体心脏功能也可能不健康。如果担心自己的心脏,请咨询医疗护理专业人员。 可能导致射血分数降低的一些因素包括: 心肌无力,例如心肌病 ...

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Implantable cardioverter-defibrillators (ICDs) - Mayo Clinic

Feb 18, 2025 · An implantable cardioverter-defibrillator, also called an ICD, is a small battery-powered device placed in the chest. It detects and stops irregular heartbeats, also called arrhythmias. An ICD constantl...

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Aortic calcification: An early sign of heart valve problems?

Jul 10, 2024 · The aortic valve is between the lower left heart chamber and the body's main artery, called the aorta. Aortic valve calcification is a condition in which calcium builds up on the aortic valve. Buildups ...

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Respiratory syncytial virus (RSV) - Mayo Clinic

Oct 4, 2023 · Respiratory syncytial virus (RSV) causes infections of the lungs and respiratory tract. It's so common that most children have been infected with the virus by age 2. Respiratory syncytial (sin-SISH-ul) v...

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Cataracts - Symptoms and causes - Mayo Clinic

5 days ago · A cataract is a clouding of the lens of the eye, which is typically clear. For people who have cataracts, seeing through cloudy lenses is often like looking through a frosty or fogged-up window. Clouded v...

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Heart failure - Symptoms and causes - Mayo Clinic

Jan 21, 2025 · Heart failure occurs when the heart muscle doesn't pump blood as well as it should. Blood often backs up and causes fluid to build up in the lungs and in the legs. The fluid buildup can cause shortness ...