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Diagnostic Testing


12 Lead Electrocardiogram (ECG or EKG)

An electrocardiogram is a noninvasive test that records the electrical activity of the heart.  The patient lies on a table or in the arms of their parents during this painless procedure.  Small stickers (electrodes) are placed on the arms, legs, and chest in order to record the rate and regularity of the heart beat.   An ECG sometimes  provides other information such as the size and position of the heart chambers , signs of damage to the heart muscle, or drug effects.  In most cases, an electrocardiogram only takes a few minutes.

Transthoracic Echocardiogram (Echo)

A transthoracic echocardiogram is a noninvasive test that uses sound waves to form images of the heart’s structure.  No radiation is used.  This test is performed with the patient lying on an exam table or in their parent’s arms.  A handheld transducer is placed on the chest over the patient’s heart using a clear gel to allow good contact with the skin.  Since the patient needs to be relatively still during this test we frequently use videos or toys to distract the younger subjects.  An echocardiogram provides information about the structure and size of the heart walls and valves, in addition to the function or “pumping ability” of the heart.   A complete transthoracic echocardiogram may take up to one hour to obtain.

Fetal Echocardiogram (Fetal Echo)

A fetal echocardiogram is similar to a transthoracic echocardiogram; however, images of the fetal heart are obtained through the mother’s abdomen.  This test frequently takes more time than the transthoracic echocardiogram because of fetal  movement and smaller heart size.  This study can take up to an hour and a half.  Not all fetal cardiac abnormalities can be identified early in the pregnancy and follow-up studies are often needed.

Exercise Stress Test

An exercise stress test is a study in which the patient walks on a treadmill while attached to an electrocardiogram.  The speed and incline of the treadmill are increased every few minutes throughout the study.  The patient’s blood pressures are recorded at regular intervals.  The Cardiologist is present and monitors the patient throughout the test.  This test reveals information about exercise capacity, heart rate and blood pressure response to exercise, and any rhythm abnormalities.  An exercise stress test usually takes about 30 minutes depending upon the patient’s physical fitness. 

Holter Monitor (24 hour Holter)

A Holter monitor is an ECG recording of the heart over a 24 hour period.  Four electrodes (stickers) are placed on the chest and are connected to a pager-sized monitor that records the heartbeat digitally.  Patients are requested to keep a diary of any symptoms while wearing the monitor.  This test is helpful in revealing any heart rhythm or rate abnormalities. 

Event Recorder

An Event recorder is a pager-sized device that a patient carries or wears which can record an electrocardiogram rhythm, typically for a minute after activation, when the patient experiences a symptom such as palpitations or lightheadedness.  The patient keeps the device for a month at a time in order to document their rhythm during any relatively infrequent or brief symptoms.


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8:00 AM – 4:30 PM

Office Info

8705 Perimeter Park Blvd.,
Suite 8
Jacksonville  FL  32216
Driving Directions

Phone (904) 296-7771
Fax (904) 296-7772

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