The PR interval on the surface electrocardiogram (ECG), which reflects the myocardial depolarization and conduction from the peri-sinus nodal atrial tissue all the way to the Purkinje–muscle junction, ...
The PR interval is the time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization). The normal PR interval measures 0.12-0.20 seconds ...
Background —Smoking is associated with arrhythmia and sudden cardiac death, but the biological mechanisms remain unclear. In electrocardiogram (ECG) recordings abnormal durations of ventricular ...
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