On inspection of a electrocardiographic rhythm strip, you note the following occurring in sustained "bursts" over 2 to 3 minutes: a rate of 195; regular rhythm; P waves and PR intervals not easily discernible; normal QRS complexes (a few are widened). What is most likely the problem?

Question

Quizplus · Accepted Answer

The sustained "bursts" of a regular rhythm with a rate of 195 suggest a reentrant SVT. The absence of easily discernible P waves and PR intervals suggests that the origin of the rhythm is above the ventricles (i.e. supraventricular). The normal QRS complexes indicate that the impulse is conducted normally through the ventricles. Ventricular tachycardia and premature ventricular contractions typically have widened and abnormal QRS complexes, and atrial fibrillation typically has an irregularly irregular rhythm with absent P waves.

On Inspection of a Electrocardiographic Rhythm Strip, You Note the Following