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Strokes:Strokes often occur when a blood clot blocks an artery in the brain and reduces the blood supply. They also can happen when a blood vessel in the brain breaks open. Both events keep blood and oxygen from reaching the brain. As a result, parts of the brain are likely to be damaged.

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Strokes:Strokes often occur when a blood clot blocks an artery in the brain and reduces the blood supply. They also can happen when a blood vessel in the brain breaks open. Both events keep blood and oxygen from reaching the brain. As a result, parts of the brain are likely to be damaged.

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Heart failure:Sometimes called congestive heart failure, heart failure occurs when the heart muscle is weakened or damaged. It can no longer pump the volume of blood needed through the body. Heart failure normally occurs when you’ve had other heart problems, such as a heart attack or coronary artery disease.Early symptoms of heart failure include fatigue, swelling in your ankles, and increased need to urinate at night. More severe symptoms include rapid breathing, chest pain, and fainting. For more on heart failure and how to recognize it, read about congestive heart failure.

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Heart failure:Sometimes called congestive heart failure, heart failure occurs when the heart muscle is weakened or damaged. It can no longer pump the volume of blood needed through the body. Heart failure normally occurs when you’ve had other heart problems, such as a heart attack or coronary artery disease.Early symptoms of heart failure include fatigue, swelling in your ankles, and increased need to urinate at night. More severe symptoms include rapid breathing, chest pain, and fainting. For more on heart failure and how to recognize it, read about congestive heart failure.

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Heart attacks:A heart attack occurs when not enough blood reaches your heart. This can happen due to artery blockage. Heart attacks damage the heart muscle and are medical emergencies.Call 911 or have someone else call if you have symptoms such as:pain in the center or left side of the chest that feels like mild or severe discomfort, pressure, fullness, or squeezingpain that radiates from the jaw, shoulder, arm, or across the backshortness of breathsweatingnauseairregular heartbeatunconsciousnessWomen often experience heart attacks a little differently, with pressure or aching in their back and chest.

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Heart attacks:A heart attack occurs when not enough blood reaches your heart. This can happen due to artery blockage. Heart attacks damage the heart muscle and are medical emergencies.Call 911 or have someone else call if you have symptoms such as:pain in the center or left side of the chest that feels like mild or severe discomfort, pressure, fullness, or squeezingpain that radiates from the jaw, shoulder, arm, or across the backshortness of breathsweatingnauseairregular heartbeatunconsciousnessWomen often experience heart attacks a little differently, with pressure or aching in their back and chest.

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Atherosclerosis and coronary artery disease:Atherosclerosis, also known as hardening of the arteries, occurs when plaque builds up on the walls of your arteries and eventually blocks blood flow. Plaque is made of cholesterol, fat, and calcium.Coronary artery disease indicates that the plaque buildup in your arteries has caused the arteries to narrow and harden. Blood clots can further block the arteries.Coronary artery disease develops over time. You can have it but not be aware of any symptoms. Other times, it may cause chest pain or the sensation of heaviness in the chest.

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Atherosclerosis and coronary artery disease:Atherosclerosis, also known as hardening of the arteries, occurs when plaque builds up on the walls of your arteries and eventually blocks blood flow. Plaque is made of cholesterol, fat, and calcium.Coronary artery disease indicates that the plaque buildup in your arteries has caused the arteries to narrow and harden. Blood clots can further block the arteries.Coronary artery disease develops over time. You can have it but not be aware of any symptoms. Other times, it may cause chest pain or the sensation of heaviness in the chest.

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High blood pressure:Blood pressure is the measurement of how much force is used to pump blood through your arteries. If you have high blood pressure, also called hypertension, it means the force is higher than it should be. High blood pressure can damage your heart and lead to heart disease, stroke, or kidney disease.There are no symptoms with high blood pressure, which is why it’s often called “the silent killer.” For more information, read about hypertension.

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High blood pressure:Blood pressure is the measurement of how much force is used to pump blood through your arteries. If you have high blood pressure, also called hypertension, it means the force is higher than it should be. High blood pressure can damage your heart and lead to heart disease, stroke, or kidney disease.There are no symptoms with high blood pressure, which is why it’s often called “the silent killer.” For more information, read about hypertension.

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Eat healthy foods. They will keep your circulatory system healthy. Iron-rich foods like beans, whole-grain breads and cereals, red meat, and green vegetables are good for your blood. Try to avoid fatty foods, especially fried foods and foods that contain a type of fat called trans fat

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this is a diagram of the circulatory system