Newspaper Page Text
Split
heart
sound
By Lawrence Lamb, M.D.
Dear Dr. Lamb — Can you
explain what the term “split
second sound” means in ref
erence to the heart? Is it se
rious or similar to a heart
murmur? Is heredity impor
tant in this condition?
Dear Reader—There are
two main heart sounds. Put
your ear to someone’s chest
over the heart and you will
hear the lub-dub, lub-dub of
the heart beat. The lub is
the first sound and the dub
the second sound. Actually,
each of these sounds has
two parts. The first sound is
from the closing of two
valves between the upper
and lower chamber of the
heart, one on each side,
right and left. These valves
close to prevent blood from
rushing backward when the
lower heart chambers are
contracting to pump blood to
the body and lungs.
The second heart sound oc
curs when the heart stops
ejecting blood and the valves
tc the two big arteries from
the heart close. One artery
is the pulmonary artery to
send blood to the lungs and
the other is the aorta to send
blood to the rest of the body.
These valves close to pre
vent blood from running
back into the heart.
The first part of the sec
ond sound is from the clo
sure of the valve in the aorta
and the second part from the
closure of the valve in the
pulmonary artery. When
these valves close at the
same time, there is only one
audible second sound-dub.
If there is a delay in closure
of one of these valves, usu
ally the one in the pulmo
nary artery, the second
sound will be split—that is,
you can hear the sound of
closure of the aortic valve
before you hear the sound
of closure of the pulmonary
valve.
In many normal young
people this occurs normally
and can be demonstrated in
different phases of breath
ing. This is a normal split
s econd sound. It doesn’t
mean a thing.
When the time for the
splitting is abnormally long
or if there is some unusual
relationship to breathing, it
can be an important clue to
a defect in the heart. Thus,
like murmurs that you asked
about, it can be unimpor
tant or it can be very impor
tant and only by knowing
the complete medical pic
ture can one be sure if it has
any significance or not.
Dear Dr. Lamb — My doc
tor tells me I have hyper
insulinism. Is that the same
thing as hypoglycemia or is
hyperinsulinism a lesser de
gree of low blood sugar?
Dear Reader—They are
all the same thing. In
creased amounts of insulin
(hyperinsulinism) cause a
decrease in glucose (hypo
glycemia) in the blood, com
monly referred to as low
blood sugar.
(NEWSPAPER ENTERPRISE ASSN.)
Ml
-==-
THE
FAMILY
LAWYER
Doting Parents
Ethel, hesitant about marrying
Fred, decided to put a blunt
question to his mother and father.
“I love your son,” she said,
“but I have doubts about his
health. Tell me frankly, is he
well?”
They assured her that he was
in perfect health. But, as they
well knew, Fred was suffering
from both tuberculosis and drug
addiction. Ethel found out the
truth shortly after the marriage,
and promptly got an annulment.
But she did not stop there.
She followed up with a damage
suit against Fred’s parents.
Grounds: fraud.
At the trial, the parents
claimed they could not be ex
pected to make unpleasant dis
closures about their own child.
Nevertheless, the court held them
liable. The judge said their de
ceit was too deliberate and too
important to be excused.
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Page 5
— Griffin Daily News Thursday, Jan. 20,1972