EKG Patterns Premature Atrial & Ventricular Contractions [PACs & PVCs]

The video tutorial explains EKG patterns, focusing on premature atrial and ventricular contractions. It covers the characteristics of PACs and PVCs, including their subtypes like bigeminy and trigeminy. The tutorial also discusses ventricular tachycardia, differentiating between sustained and unsustained forms.

What is a key characteristic of a premature atrial contraction (PAC) on an EKG?

• A high amplitude QRS complex

• A missing T wave

• A premature P wave

• A wide QRS complex

How does a premature ventricular contraction (PVC) differ from a PAC on an EKG?

• It has a wide and rounded QRS complex

• It is preceded by a P wave

• It has a higher amplitude than a normal QRS

• It has a narrow QRS complex

What does a polymorphic PVC indicate?

• All PVCs are identical in shape

• PVCs vary in shape and direction

• PVCs occur at regular intervals

• PVCs are always followed by a P wave

In a bigeminy pattern, how often does a PVC occur?

• Every two QRS complexes

• Every three QRS complexes

• Every four QRS complexes

• Every five QRS complexes

What is a characteristic of a monomorphic PVC?

• PVCs are always followed by a P wave

• PVCs occur randomly

• All PVCs have the same shape

• All PVCs have different shapes

In a quadrigeminy pattern, how often does a PVC occur?

• Every four QRS complexes

• Every five QRS complexes

• Every two QRS complexes

• Every three QRS complexes

What defines a couplet in terms of PVCs?

• Two PVCs separated by a normal QRS

• A PVC followed by a normal QRS

• Two PVCs occurring consecutively

• Three PVCs in a row

What is the minimum number of PVCs in a row required to classify as ventricular tachycardia (VT)?

• Five

• Four

• Three

• Two

How is unsustained ventricular tachycardia defined?

• Two PVCs in a row lasting less than 30 seconds

• Two PVCs in a row lasting more than 30 seconds

• More than three PVCs in a row lasting less than 30 seconds

• More than three PVCs in a row lasting more than 30 seconds

What differentiates sustained ventricular tachycardia from unsustained VT?

• It lasts more than 30 seconds

• It involves fewer than three PVCs

• It is always polymorphic

• It lasts less than 30 seconds