What does ventricular parasystole look like on EKG?

What does ventricular parasystole look like on EKG?

• A. Only normal QRS complexes without PVCs
• B. Distinct ventricular complexes disrupting the normal rhythm
• C. A series of consecutive PVCs
• D. Normal rhythm with occasional missed beats

Answer: (B)

Ventricular parasystole is characterized by distinct ventricular complexes that occur independently from the underlying atrial rhythm. On an EKG, this condition manifests as additional ventricular complexes that appear at regular intervals, which can disrupt the normal rhythm of the heart. These complexes are not influenced by the normal conduction pathways and can occur simultaneously with other heartbeats, creating a pattern that is atypical for the heart.

This disruption can be visually documented on an EKG, where you would see the usual ventricular complexes (QRS) interspersed with these additional, unique complexes that arise from ectopic foci in the ventricles. These parasystolic beats can create a characteristic "marching" pattern on the EKG, as they might not be in sync with the normal sinus rhythm.

In summary, the presence of these distinct ventricular complexes is what correctly identifies ventricular parasystole on an EKG, clearly distinguishing it from other potential arrhythmias that do not exhibit the same independent and consistent additional beats.