Almost everyone knows what a basic EKG tracing looks like. But what does it mean?
• The first little upward notch of the EKG tracing is called the “P wave.” The P wave indicates that the atria (the 2 upper chambers of the heart) are electrically stimulated to pump blood to the ventricles. • The next part of the tracing is a short downward section connected to a tall upward section. This next part is called the “QRS complex.” This part indicates that the ventricles (the 2 lower chambers of the heart) are electrically stimulated to pump out blood. • The next short upward segment is called the “ST segment.” The ST segment indicates the amount of time from the end of the contraction of the ventricles to the beginning of the rest period before the ventricles begin to contract for the next beat. • The next upward curve is called the “T wave.” The T wave indicates the resting period of the ventricles. When your physician studies your EKG, he/she looks at the size and length of each part of the EKG. Variations in size and length of the different parts of the tracing may be
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