When our
three year old daughter was two months old we noticed she was not eating, she
was lethargic and her hands and feet were cold. We brought her to the
hospital where they hooked her up to an electrocardiogram (ECG) and her heart
rate was about 300 beats per minute. My husband and I were really scared
because at that point were didn't know what was wrong with her. They
transported her to Sick Kids where she was diagnosed with a heart condition
called Supraventricular Tachycardia (SVT).
Supraventricular
Tachycardia (SVT) is when the heart beats very fast. During an episode of
SVT there's a malfunction with the electrical system in the upper chambers of
the heart causing a rapid heartbeat. Symptoms of SVT include heart
palpitations, dizziness, light-headedness, chest pain and shortness of
breath. An episode can last a few seconds or several hours. Our
daughter used to experience SVT episodes frequently and when they occurred we
had to take her to the hospital so they can administer adenosine through an IV
to slow down her heart rate. A couple of weeks ago she had an episode,
but she didn't have to go to the hospital because this time it corrected
itself. Even though it was a short episode the doctor was still concerned
so our daughter had to wear a holter monitor for twenty-four hours to monitor
her heart activity. For the next six to eight weeks we have to carry around
a heart transmitter and if she has an episode it has to be recorded immediately
and sent to the hospital.
SVT can
be treated with medication known as beta blockers. Our daughter used to
take them three times a day but about six months ago the doctor took her off
them as she wasn't having episodes. If she starts having episodes again
she will probably have to start taking them again. When she's school age
she can have surgery to correct the problem. During this procedure a
catheter is inserted into a vein in the upper leg using a fluoroscope to record
electrical signals in the heart. During surgery the faulty electrical
circuit is destroyed.
Besides
having SVT, our daughter is a healthy active child. The cause of her SVT
is unknown, but when it happens we're prepared.