Atrial tachycardia
MSP221 recording · 14
Clinical history not documented in this image source.
Original waveform retained; quiz cropping only removes off-tracing interpretation or a row containing an answer label. Some sources are rhythm strips rather than a full 12-lead ECG.
Look for
- Non-sinus P waves.
- Narrow-QRS tachycardia.
Where to look. Compare P waves with QRS complexes, especially in the inferior leads.
An atrial focus outside the sinus node activates the atria, changing the P-wave shape.
The source diagnosis is retained; no additional clinical cause is inferred.
References & provenance
John Hampton; David Adlam. The ECG Made Practical, 7th ed. (2019), ch. 4, pages du PDF / PDF pp. 121.
W.G. de Voogt, MD, PhD, SLAZ, The Netherlands. Atrial tachycardia; ECGpedia Atrial Tachycardia page identifies non-sinus P waves preceding narrow QRS complexes.. https://commons.wikimedia.org/wiki/File:DVA0237_(CardioNetworks_ECGpedia).jpg. CC BY-SA 3.0. Adaptation: lossless metadata removal/encoding; quiz crop removes off-tracing labels/interpretive panels where applicable. Derivative image retains the same license. CC BY-SA 3.0
Adaptation: cropping and removal of headers/annotations outside the tracing where applicable; metadata removed. Waveforms have not been redrawn.
Compared with the published source; no independent clinical validation is claimed.
Original annotations & limitations
Atrial tachycardia; image DVA0237 from ECGpedia Atrial Tachycardia page
Atrial tachycardia; ECGpedia Atrial Tachycardia page identifies non-sinus P waves preceding narrow QRS complexes.
Original source labels retained. Question wording limited to visible findings; no independent clinical validation claimed.