QRS complexes that measure 0.12 seconds or greater and a heart rate between 20 and 40 bpm indicate that the impulses causing ventricular depolarization are coming from Purkinje fibers.
The QRS complex is containing three waves. These waves display the changeful course of the energetic provocation as it passes through the heart's broadcast structure. The QRS complex is the main pierce visualized in the standard ECG. It is the ultimate apparent constituent the ECG, that is precisely seeable. The QRS complex shows the depolarization of ventricles. It shows the beginning of systole and ventricular shortening.
The Purkinje fibers are specific administering fibers calm of electrically impulsive containers. They are higher in the number of cardiomyocytes accompanying lean myofibrils and many mitochondria. They conduct cardiac operation potentials faster and more efficiently than the additional containers in the soul's energetic broadcast plan.
To know more about Purkinje fibers refer to: https://brainly.com/question/3464972
#SPJ4