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I have a heart. Of course we all assume we have one because the pulse tells us that one beats inside, but I now know I have one because I’ve seen it. Not literally in the flesh so to speak, but via an ultrasound monitor that produced images as it contracted and expanded while pushing blood around my body. “Here is a view from below, and here we’re looking diagonally down to see that the valves inside the chambers are opening and closing without regurgitation.” [Read more…] about If I only had a heart