history of blood transfusions |
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how blood Rh factor affects pregnancy |
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white blood cell chases bacterium |
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how do platelets work? |
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flow of blood through the heart |
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how the heart works |
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how the heart works 2 |
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cardiologist explains the heart |
cardiac conduction system |
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how the cardiac cycle is produced by electrical impulses in the heart |
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electrocardiographs |
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how to read an ekg |
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what is atrial fibrilation |
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cardiac arrhythmia |
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what is a heart attack? |
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What happens during a heart attack? |
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how to measure blood pressure |
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listen: can you read this patient's blood pressure? |
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