Example 1: Normal ECG

Normal ECG showing normal activiation of the atria (top chambers of the heart) and the ventricle (bottom atria of the heart).

 Example 2: Superventricular Tachycardia (SVT)

Catheter ablation is highly successful in these rhythm disturbances, can be performed with minimal risks and should be considered in the symptomatic patient.

 Example 3: Atrial Flutter

Atrial flutter showing a very rapid atrial rate with slower conduction to the ventricle.  This arrythmia is treatable with catheter ablation with a very high success rate.  It also confers a risk of stroke and warfarin treatment should be considered.

 Example 4: Atrial Fibrillation

Atrial fibrillation with rapid and irregular atrial activation. The ventricular rate is much slower but still not very well controlled.  There is one ventricular ectopic beat.  Patients with atrial fibrillation are at risk of stroke and warfarin treatment should be considered.

These patients need to be seen by a cardiologist for treatments currently available. There are evolving techniques of rate and rhythm control that should be considered.

Example 5: Accessory Pathway

Evidence of an accessory pathway (WDW) with the slurring of activity from the atria to the ventricle. Such patients need to be assessed by an Electrophysiologist to determine the risk of accelerated conduction through the pathway.  These patients can be at risk of sudden cardiac death.