6. This is the external
appearance of a
normal heart.The
epicardial surface is
smooth and
glistening.The
amount of epicardial
fat is usual.The left
anterior descending
coronary artery
extends down from
the aortic root to the
apex.
9. 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.
10. 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!
11. 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
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:
12. 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!
