P-R segment

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P-R segment

The line on an electrocardiogram that begins with the end of the P wave and ends with the beginning of the QRS. It corresponds to the period between the end of atrial depolarization and the onset of ventricular depolarization.
See also: segment


in electrocardiography, refers to the P and R waves.

P-R interval
the period from the beginning of the P wave to the beginning of the QRS complex.
P-R segment
the isoelectric tracing that follows the P wave and ends with the deflection of the Q wave. It represents the delay of the electrical impulse at the atrioventricular node.