PR measurement has been a challenge for the PR industry for years. It definitely mattered, but it was often easier to ignore it, letting it sit alongside other tasks that no one wanted to tackle.

The electrocardiogram (ECG) is a valuable tool for assessing the cardiac conduction system. The measurements routinely obtained with ECG include heart rate, PR interval, QRS duration and the QT ...

In myocardial excitation, the delay between the excitation of the atria and ventricles is determined by the sum of atrial and atrioventricular nodal conduction. This delay, measured in milliseconds, ...