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Like the index finger can determine a bad temperament (see slide 1), the ring finger can show a future risk of a cardiac catastrophe. Studies have found a link between boys whose ring fingers were the same length or shorter than their index fingers and higher risk of a heart attack at an unusually young age – in late 30’s or 40’s. This is due to the fact that men tend to have a relatively longer ring finger because of higher levels of testosterone, which is known to protect against heart problems. Shorter ring fingers mean less testosterone because the genes that are indirectly responsible for the production of testosterone also control the development of the digits.