EKG: Interpret this rhythm strip

Practice reading the EKG along with calibration marks - for both EKG and Arterial trace.
A-pacing with capture.
Note: Arterial trace has a calibration mark that denotes 55/80/105 mmHg. EKG trace is recorded in 1x standardization.

EP, ICU: Junctional Tachycardia vs. Ventricular Tachycardia

3 mo old infant s/p VSD repair. Postop. day 1.
Note: Paper speed is at 50 mm/sec.
What is the ventricular rate at baseline?
In the second panel, patient is atrially-paced. What do you observe?
Is this junctional ectopic tachycardia or ventricular tachycardia?

(To see a clearer image: Click on the image first. When the new window appears, click on the image again)


EP - Isorhythmic Dissociation

What is isorhythmic dissociation?
These two sets are from the same patient and is supposed to show it.


EP: Interpret this

Infant s/p VSD repair and Junctional Ectopic Tachycardia (JET). Postop. day 4. Recovering from JET. On Amiodarone and Esmolol.

What it the diagnosis?

Is the AV conduction intact? How can this be confirmed?


ICU, EP: DDD pacemaker

8 month old girl s/p Repair of AVSD. Permanent pacemaker (DDD) has been placed for postoperative A-V block. Currently, admited for respiratoy distress. Interpret this ICU monitor trace.