115,000 – the number of times our heart beats in a day. 2,000 – the number of gallons of blood pumped by the heart every day. 1893 – the year in which the first open-heart surgery occurred. 3,500 – the age in years of an Egyptian mummy in which the earliest-known case of heart disease was identified. 1,200 – the fastest heartbeat per minute — that of the pygmy shrew. 1 pound – the weight of the human heart. 60,000 – the number of miles our blood vessel system can extend to. 1,500 pounds – the weight of a blue whale’s heart. 1.5 gallons – the amount of blood pumped by our heart each minute.