A Child's Normal Conduction System

The sinus node (sinoatrial node or SA node) is the heart's own pacemaker. The electrical impulse is normally initiated here. The impulse travels across the atria (top 2 collecting chambers) stimulating contraction or "squeeze" and will eventually push blood into the ventricles (the bottom 2 pumping chambers).

The impulse then reaches the AV node (atrioventricular node). This is referred to as the "gateway" to the ventricles. The AV node receives the impulse from the SA node.

The impulse moves through special electrical tissue starting at the Bundle of His, moving to the bundle branches. This stimulates ventricular squeeze, which pumps blood to the lungs and the rest of the body. Each of these cycles is a "heart beat". Below is a picture of cardiac conduction system.

Normal heart rate varies in children based on age. Infants and children have a faster heart rate compared to adults. The normal adult heart rate is 60-100 beats per minute

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Heart Rhythm Disorders
Millions of people experience irregular or abnormal heartbeats, called arrhythmias, at some point in their lives. Most of the time, they are harmless and happen in healthy people free of heart disease. However, some abnormal heart rhythms can be serious or even deadly. Having other types of heart disease can also increase the risk of arrhythmias.
Pediatrics and Congenital Heart Disease (CHD)
This section is for pediatric patients and families living with heart rhythm disorders and heart rhythm disorders related to congenital heart disease (CHD).
Early Warning Signs
If you are experiencing a racing, pounding, rumbling or flopping feeling in your chest or if you have been fainting, having repeated dizzy spells, feeling lightheaded or you are extremely fatigued, it's time to see a doctor to discuss your heart health.
Common Treatments
Learning about the underlying cause of any heart rhythm disorder provides the basis for selecting the best treatment plan. Information and knowledge about care options, and their risks and benefits help you work with your health care provider to make the best choices.
Since other heart disorders increase the risk of developing abnormal heart rhythms, lifestyle changes often are recommended. Living a “heart healthy” lifestyle can ease the symptoms experienced with heart rhythm disorders and other heart disorders, and can be beneficial to overall patient health.
The Normal Heart
The heart is a fist-sized muscle that pumps blood through the body 24 hours a day, 365 days a year, without rest. The normal heart is made up of four parts: two atria on the top of the heart (right atrium and left atrium), and two ventricles (right ventricle and left ventricle) which are the muscular chambers on the bottom of the heart that provide the major power to pump blood.