Medical condition where SA node ceases to generate the electrical impulses that normally stimulate the tissues for heart conduction.

A common cardiac dysrhythmia characterized by premature heartbeats originating in the atria.

Common in elderly and is associated with exacerbations of chronic obstructive pulmonary disease (COPD).

Arrhythmia resulting from impulses coming from a locus of tissue in the area of the AV node, the "junction" between atria and ventricles.

Rate: less than 60 bpm

Rhythm: regular

Represents the delay or interruption, intermittent or permanent, of the electrical impulse from SA node to the atria.

Causes: alcohol, medications/drugs, caffeine, tobacco, exercise, anxiety, or any chemical imbalances

Occurs when the natural pacemaker site shifts between SA node, the atria, and/or the AV node.

The heart does not pump blood very well when it is beating too fast; Vital organs such as the heart muscle and brain may not get enough blood. Congestive heart failure, heart attack, and stroke can result.

Rate: 150 – 250 bpm

Rhythm: regular

EKG Interpretation:

Lead I is negative, Lead II is positive, and Lead III is Positive:

ST Depression

The only lead that a STEMI cannot be seen.

Occlusion of this artery is often the most fatal.

ST Elevation

If a spike is seen before the P wave, then it indicates the presence of a single chamber atrial pacemaker