Second Degree AV Block Type I (Wenckebach)

A Second Degree AV Block Type I (Wenckebach) is a relatively benign arrythmia that occurs when there is a conduction blockage between the atria and the ventricles.

Second Degree AV Block Type I (Wenckebach) ECG

Heart Rate: normal.

Rhythm: the atrial rythm is essentially regular, but the ventricular rhythm is irregular.

P waves: normal.

PR- Interval: gradually lengthening until a missed beat occurs.

QRS Complexes: usually normal.

Second Degree AV Block Type I (Wenckebach) Signs and Symptoms

The patient is usually asymptomatic.