Front

Also known as the baseline, it is best determined by drawing a line between the end of the T and beginning of the P wave.

Back

isoelectric line

Front

Located in the proximal intraventricular septum. It merges from the AV node to begin the conduction of the impulse from the AV node to the ventricles.

Back

Bundle of His

Front

A small rounded wave on an EKG that indicates atrial contraction.

Back

P wave

Front

The interval of time between the P wave and the R wave on the ECG.

Back

PR interval

Front

A QT interval longer than 0.42 secs.

Back

Long QT interval

Front

A heart rhythm initiated in the AV node in the event of SA node failure.

Back

Junctional rhythm

Front

The interval from the peak of one QRS complex to the next. It is used as an indicator of regularity when evaluating the heart's rhythm on an EKG.

Back

R-R interval

Front

Portion on the EKG wave from the end of the P wave to the beginning of the QRS complex, lasting about 0.1 secs.

Back

PR segment

Front

A cluster of special muscle fibers located in the right atrial wall of the heart considered to be the primary pacemaker of the heart.

Back

SA node

Front

EKG measurement of the time between ventricular depolarization and repolarization.

Back

QT interval