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Tachycardia Causes. The most common cause of tachycardia in children and teenagers is sinus tachycardia. This simply means that the sinus node is firing at a fast rate. Most of the time sinus tachycardia is a normal physiologic response. For example, during exercise the heart rate normally increases as the metabolic needs of the body increase.
For a baby, sinus tachycardia is usually means a heart rate over 160-170 beats per minute. In a school age child, sinus tachycardia is usually considered a heart rate over 120 beats per minute. Sinus Tachycardia Causes. Most of the time sinus tachycardia in children is not a problem, but actually a normal physiologic response of the body.
Atrial tachycardia in children (also know as atrial ectopic tachycardia or AET) is an arrhythmia, or abnormal heart rhythm that causes a fast heart rate. Normal electrical conduction in the heart starts with the generation of electricity in the sinus node in the upper portion of the right atrium. Electricity moves from the sinus node through ...
This process is known as cardioversion. Cardioversion can be achieved in many different ways. Most commonly it is done through the use of medications or by applying an electrical current to the heart. In children, cardioversion is most commonly used for the treatment of supraventricular tachycardia (SVT). In SVT, an electrical circuit is formed ...
Bradycardia simply means a slow heart rate. A normal heart rate in children varies quite a bit based on age as well as activity level. In a normal teenager, a resting heart rate is typically between 60 and 100 beats per minute. With activity, the heart rate may get as high as 200 beats per minute. During sleep, the heart rate can occasionally ...
A ventricular septal defect (VSD) is a hole in the ventricular septum, the lower wall of the heart separating the right and left ventricles (see normal heart anatomy). A VSD is a congenital heart defect, in other words, a birth defect of the heart. Congenital heart defects are the most common form of birth defects, occurring in approximately 1 ...
Supraventricular tachycardia is a type of arrhythmia, or abnormal electrical process in the heart. A small percentage of children, about 3 in 1000, have extra conducting tissue from the top to the bottom chambers. This extra conducting tissue is termed an “accessory pathway.”. The majority of the time the accessory pathway does not conduct ...
Services. At Pediatric Cardiology Associates of Houston, we offer the following tests and procedures. For the convenience of the families we serve, many of these can be performed at the time of your visit in our office. When warranted, we use hospital outpatient or inpatient service for more sophisticated tests and procedures.
Problems such as hypertrophic cardiomyopathy, ventricular tachycardia, long QT syndrome, myocarditis, and Marfan syndrome may all predispose a child or teenager to sudden cardiac events. Although these types of problems can be devastating when they occur in children, fortunately they are not heart attacks in the literal sense of the word.
In this setting they may progress to cause supraventricular tachycardia (SVT) or atrial tachycardia. The job of the pediatric cardiologist is to determine whether a child with frequent PAC's has any type of disease process that is causing them, or whether the PAC's are still normal but simply more frequent than most other children have.