Wolff-Parkinson-White (WPW) syndrome
What is the arrhythmia?
Heartbeat is controlled by electrical signals that normally occur in the right chamber (atrium), passing through the electrical wiring of the heart muscles to the AV node, located between the atria and ventricles (ventricles), and from there passes impulses down into the ventricles. Heart problems, arrhythmias, occur when the electrical impulses in your heart do not occur, or sent out on the proper way. It may mean that your heart beats too fast, as well slow or irregular - which gives an irregular pulse.
Cardiac arrhythmias may occur during a malfunction in any part of the heart's electrical system. Doctors classify arrhythmias based on where they occur in the heart (the atria or ventricles) and the speed of the heartbeat.
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Tachycardia means rapid pulse - that is, more than 100 beats per minute.
Bradycardia means slow heartbeat - a resting heart rate below 60 beats per minute.
Not all tachycardias or bradycardia means disease. In connection with the physical stress, it is normal that there is tachycardia to ensure that your tissues get enough oxygen-rich blood. Conversely, athletes often have a resting heart rate below 60 beats per minute because their hearts are working as efficiently (pump much blood at once).
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