Exam 13: Origin and Clinical Aspects of Junctional Dysrhythmias

Preexcitation syndromes occur when accessory conduction pathways exist between the atria and ventricles that bypass the AV node and bundle of His and allow the atria to depolarize the ventricles earlier than usual.

Patients with WPW are vulnerable to PSVT.

In junctional escape rhythm, the pacemaker site is in the:

PR intervals of less than 0.12 seconds indicate:

Impulses that originate in the AV junction produce inverted P' waves (when they would otherwise be upright) with a P'R interval that is less than 0.12 seconds in duration.

Causes of junctional escape rhythm include:

The sustained rapid ventricular rates and retrograde depolarization of the atria in junctional tachycardia can lead to compromised cardiac output in patients with underlying heart disease.

Which of the following is a junctional dysrhythmia?

Impulses that originate in the AV junction travel:

Premature junctional complexes:

Causes of accelerated junctional rhythm include:

P' waves that originate from the AV junction are most often buried in or follow the QRS complex.

Criteria for WPW include:

Match the following junctional rhythms with the appropriate heart rate. beats per minute dysrhythmiasjunctional tachycardia: -slow junctional escape

Treatment of symptomatic junctional escape includes:

Rhythms that originate in the AV junction, the area around the AV node and the bundle of His, are referred to as ______ rhythms.

Match the following junctional rhythms with the appropriate heart rate. beats per minute dysrhythmiasjunctional tachycardia: -junctional escape rhythm

Match the following junctional rhythms with the appropriate heart rate. beats per minute dysrhythmiasjunctional tachycardia: -accelerated junctional rhythm

Which of the following is the most distinguishing characteristic that helps identify junctional dysrhythmias?

When every third beat is a PJC, it is called ______ PACs.