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. 2004 Jul 1;4(3):152-4.

An unusual tachycardia

Sam Hanon  1 , Michael Shapiro, Paul Schweitzer
Affiliations

An unusual tachycardia

Sam Hanon et al. Indian Pacing Electrophysiol J. .

Abstract

The following article presents an unusual case of atrial tachycardia, initially misdiagnosed due to a lack of clear P waves. The diagnosis was eventually confirmed using the atrial electrogram from the patient's pacemaker.

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Figures

Figure 1
Figure 1
Initial ECG on presentation: Wide complex tachycardia at 170 bpm with LBBB morphology
Figure 2
Figure 2
Repeat ECG after resolution of symptoms: LBBB morphology with a ventricular rate of 85 bpm and no clear P wave activity
Figure 3
Figure 3
Pacemaker interrogation demonstrating sensed atrial activity at 170 bpm and conduction to the ventricle 2:1 resulting in a ventricular rate of 85 bpm, confirming a diagnosis of atrial tachycardia
See this image and copyright information in PMC

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References

    1. Zipes DP, DeJoseph RL. Dissimilar atrial rhythms in man and dog. Am J Cardiol. 1973;32:618–628. - PubMed

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