Complete AV block with slow escape
MSP221 recording · 07
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
- No fixed P–QRS relationship.
- Slow broad QRS complexes.
Where to look. P waves proceed independently of slow broad QRS complexes. Inspect the lead-II strip.
An escape is a late backup mechanism; an ectopic premature beat occurs early. This complete-block recording illustrates a slow backup rhythm, but width alone does not establish its focus.
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. 98-100.
James Heilman, MD. Third degree heart block. https://commons.wikimedia.org/wiki/File:CompleteHeartBlock.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
Third degree heart block
Third degree heart block
Original source labels retained. Question wording limited to visible findings; no independent clinical validation claimed.