Complete AV block with junctional escape
MSP221 recording · 04
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
- Independent P waves and QRS complexes.
- Slow relatively narrow escape rhythm.
Where to look. Compare P waves and QRS complexes: the rhythms are independent; the escape is relatively narrow.
A junctional focus takes over. The ventricular conduction system is usually used, preserving narrow QRS complexes.
The source diagnosis is retained; no additional clinical cause is inferred.
References & provenance
John Hampton; Joanna Hampton. The ECG Made Easy, 9th ed. (2019), ch. 4, pages du PDF / PDF pp. 96-97.
Complete AV block with junctional escape
Jer5150; image credit Jason E. Roediger, CCT, CRAT. Complete AV block with junctional escape. https://commons.wikimedia.org/wiki/File:Complete_A-V_block_with_resulting_junctional_escape.png. 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
Complete AV block with junctional escape
Complete AV block with junctional escape
Original source labels retained. Question wording limited to visible findings; no independent clinical validation claimed.