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Most experts believe that the famous artist Vincent van Gogh was using foxglove (Digitalis), the flower from which digoxin is derived, which could explain the yellow paintings toward the end of his life.

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Basic explanation of the electrical system of the heart

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See where the pacemaker cells start the electrical wave of depolarization, and how it gets all the way to the ventricles of the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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See how muscle cells in the heart contract by allowing Calcium to flow inside and bringing along some positive charge with it! Rishi is a pediatric infectious disease physician and works at Khan Academy.

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Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! Rishi is a pediatric infectious disease physician and works at Khan Academy.