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Conduction System of the Heart

Sinoatrial (AV Node) Inherent Rate: 60 - 100 bpm; Atrioventricular Juction Rate: 40 - 60 bpm (Note: not the AV Node rate); HIS Perkinjie System (Ventricular Rate): 20 - 40 bpm

Length: 1:7

The Pacemaker of the Heart

The Pacemaker of the Heart The pacemaker of the heart, a tiny area of specialized nervous tissue in the right atrium, sets the heart beating about seventy times a minute. Without it the heart would beat only forty times per minute, which is too slow for the body's needs. The pacemaker, or...

Length: 0:40

2nd Degree AV Block Type I, Mobitz I, Wenckebach

PR Interval lengthens progressively and drops a QRS. It is caused by conduction delay in the AV node in 70% of patients and by conduction delay in the His-Purkinje system in the remaining 30%. The presence of a narrow QRS complex suggests the site of the delay is more likely to be in the AV node....

Length: 1:1

2nd Degree Atrioventricular Block Type I, Mobitz I, Wenckebach

PR Interval lengthens progressively and drops a QRS. It is caused by conduction delay in the AV node in 70% of patients and by conduction delay in the His-Purkinje system in the remaining 30%. The presence of a narrow QRS complex suggests the site of the delay is more likely to be in the AV node....

Length: 0:31

Atrial Ventricular Pacing

Does not originate in the AV junction but are the result of conduction disturbances at the AV node. This arrythmia category is commonly called Heart Block because conduction fails to make it though the AV node

Length: 1:4

Cardiac Cycle - Systole & Diastole

Thanks to McGraw Hill you can watch this video of the cardiac cycle!

Length: 1:21

WPW

Wolf'f Parkinson White - Wolff-Parkinson-White syndrome is a condition characterized by abnormal electrical pathways in the heart that cause a disruption of the heart's normal rhythm (arrhythmia). The heartbeat is controlled by electrical signals that move through the heart in a highly...

Length: 9:30

Junctional Escape Rhythm, Junctional Rhythm, Idiojunctional Rhythm

Impulses originate from the AV Junction area and not the from the AV Node. The AV Node is only a gate-keeper of impulses and has not capabilities of creating impulses. Junctional Inherent Rate: 40-60 bpm. Junctional impulses have an Antegrade (upright waveforms) and Retrograde (inverted...

Length: 1:1

SESSIONS FOR NURSES 16 - EKG INTERPRETATION (Part 1 of 3)

EKG Interpretation basics, Heart's Electrical Conduction System, What is WRONG with this EKG? Heart rates, normal and abnormal. Sinus Bradycardia, Sinus Rythm, Sinus Tachycardia.