Interesting Heart Facts

What causes the sound your heart makes?
When someone listens to your heart with a stethoscope the sound is often described as - lub-dub lub-dub. The 1st heart sound (lub) is caused by the acceleration and deceleration of blood and vibration of the heart at the time of the closure of the Tricuspid and Mitral Valves. The 2nd heart sound (dub) is caused by the same acceleration and deceleration of blood and vibrations at the time of closure of the Pulmonic and Aortic Valves.

How may times does you heart beat?
The average heartbeat is 72 times per minute. In the course of one day it beats over 100,000 times. In one year the heart beats almost 38 million times, and by the time you are 70 years old, on average, it beats 2.5 billion times!

Does your heart rate change as we age?
Everyone's pulse (average heart rate per minute) changes as we age. Here is a chart of average pulse at different ages:

Age Pulse
Newborn 130
3 Months 140
6 Months 130
1 Year 120
2 Years 115
3 Years 100
4 Years 100
6 Years 100
8 Years 90
12 Years 85
Adult 60 - 100

How much blood does your heart pump?
An average heart pumps 2.4 ounces (70 milliliters) per heartbeat. An average heartbeat is 72 beats per minute. Therefore an average heart pumps 1.3 gallons (5 Liters) per minute. In other words it pumps 1,900 gallons (7,200 Liters) per day, almost 700,000 gallons (2,628,000 Liters) per year, or 48 million gallons (184,086,000 liters) by the time someone is 70 years old. That's not bad for a 10 ounce pump!