How did Hippocrates deduce that the clubbing around the fingers was due to heart problems?
If you google Hippocrates and clubbing you get about 800 hits. Many of them state that Hippocrates associated clubbing with lung disease but none that I came across describe exactly how he did it. I can only suggest you read what the man himself had to say Adams F (trans) “The Genuine works of Hippocrates” (vol 1) New York, Wm Wood and Co, 1891, p206 Good luck.