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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.
The familiar sounds of your heart are made by the heart's valves as they open and close.
In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.