Practice EKG Rhythm Strips 144: Various Escape Beats

The SA node is dominant pacemaker of the heart and has the fastest rate.   Next, the AV node has the second fastest rate.  When the sinus node fails to discharge then another pacemaker within the heart, either atrial, AV nodal, or ventricular cells will generate an impulse. If a site within the atrium generates an impulse then it is termed an atrial escape beat.   If the AV node becomes the dominant pacemaker then the resulting beat is called a junctional escape beat.  If a ventricular site generates an impulse then a ventricular escape beat is produced. 

Identify the following escape beats.

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Answers


1.

Normal sinus rhythm with a sinus pause and a ventricular escape beat

2.

Normal sinus rhythm with a sinus pause and a junctional escape beat

3.

Normal sinus rhythm with a sinus pause and an atrial escape beat

4.

Sinus tachycardia with a sinus pause and a ventricular escape beat

5.

Normal sinus rhythm with a sinus pause and a junctional escape beat

6.

Normal sinus rhythm with a sinus pause and an atrial escape beat

7.

Sinus tachycardia with a sinus pause and a ventricular escape beat

8.

Normal sinus rhythm with a sinus pause and an atrial escape beat

9.

Normal sinus rhythm with a sinus pause and an atrial escape beat

10.

Normal sinus rhythm with a PAC and PVCs and a junctional escape beat