What does the PR interval measure?
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Isabella Davis
Studied at the University of Amsterdam, Lives in Amsterdam, Netherlands.
As a cardiac electrophysiologist, I specialize in the study of the electrical properties and functions of the heart. When it comes to interpreting electrocardiograms (ECGs), understanding the significance of various intervals is crucial. The PR interval is one such critical measurement.
The PR interval measures the time it takes for an electrical impulse to travel from the atria to the ventricles through the atrioventricular (AV) node and bundle of His. It is measured from the beginning of the P wave, which signifies the start of atrial depolarization, to the beginning of the QRS complex, which marks the beginning of ventricular depolarization. A normal PR interval is typically between 120 and 200 milliseconds.
Works at the International Civil Aviation Organization, Lives in Montreal, Canada.
In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization); it is normally between 120 and 200ms in duration.
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Julian Lopez
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In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization); it is normally between 120 and 200ms in duration.
