This rhythm strip illustrates PJC. Look for the following distinguishing characteristics:

• Rhythm: Irregular atrial and ventricular rhythms
• Rate: 100 beats/min
• P wave: Inverted and precedes the QRS complex with PJC; otherwise normal configuration
• PR interval: 0.14 second for the underlying rhythm and 0.06 second for the PJC
• QRS complex: 0.06 second
• T wave: Normal configuration
• QT interval: 0.36 second
• Other: Pause after PJC