Microcomplex--a new incomplete heart block pattern.
This article reports a new, transient, but identical electrocardiogram presentation in 2 patients at 2 different institutions. While its mechanism is uncertain, analysis by exclusion suggests that a diffusely prolonged but nonhomogenous myocardial refractoriness may have altered both QRS morphology and amplitude and also may have resulted in periods of 2:1 AV block.
Cardiology Division, Department of Medicine, Columbia University, NYC, NY, USA.
James A
JA
Reiffel
James
J
Cook
D000368:Aged; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000503:physiopathology*; D006801:Humans