This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is atrial tachycardia. If less than 100 beats per minute ...

The spread of impulses over the ventricles, if activation occurs by way of an accessory pathway, may logically be considered more comparable to ventricular ectopic beats than to bundle-branch block.

higher automaticity – ectopic beats; and re-entry – atrial tachyarrhythmia; and higher vulnerability to arrhythmia – heart rate and its variability. Most of these predictors are not ready ...

Sinus bradycardia occurs when the heart rate is less than 60 beats per minute and sinus tachycardia ... of a sinus P wave on the ECG. Note that ectopic atrial rhythms can have a P wave before ...