Question

A CCMA is measuring the intervals on the EKG tracing. Which of the following is an anticipated finding of impaired conduction through the AV node, and Why?
Decreasing QT intervals
Prolonged QRS intervals
Prolonged QT intervals
Prolonged PR intervals
Use proper citation of sources APA style.

Answer 1

Prolonged PR intervals.

A prolonged PR interval indicates delayed conduction of the sinoatrial, or SA, nodal impulse to the ventricles and is called first-degree AV block. A short PR interval can be seen when the AV node delay is bypassed, such as in Wolff-Parkinson-White syndrome or Lown-Ganong-Levine syndrome.

Summary

Short QT syndrome (SQTS) is an inherited cardiac channelopathy characterised by an abnormally short QT interval and increased risk for atrial and ventricular arrhythmias.

A “wide QRS complex” refers to a QRS complex duration ≥120 ms. Widening of the QRS complex is related to slower spread of ventricular depolarization, either due to disease of the His-Purkinje network and/or reliance on slower, muscle-to-muscle spread of depolarization.

In long QT syndrome, your heart's electrical system takes longer than normal to recharge between beats. This delay, which often can be seen on an electrocardiogram (ECG), is called a prolonged QT intervals.