Open AccessDifferent QRS morphologies in a dual-chamber pacemaker: what is the mechanism?
Author(s) -
Oswaldo Gutiérrez
Publication year - 2017
Publication title -
journal of thoracic disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 60
eISSN - 2077-6624
pISSN - 2072-1439
DOI - 10.21037/jtd.2017.10.90
Subject(s) - medicine , qrs complex , single chamber , mechanism (biology) , cardiology , dual (grammatical number) , biomedical engineering , art , literature , philosophy , epistemology
A 12-lead electrocardiogram (ECG) of a dual-chamber pacemaker with different paced QRS morphologies is presented. Such an observation is usually made when there are different degrees of fusion, in association with the intrinsic rhythm in the presence of spontaneous changes of the stimulation mode of the pacemaker.