ArticleJACC. Case reports2026
Northwest Axis on Electrocardiogram: Decoding an Unusual Cardiac Axis in a Young Patient.
Article in JACC. Case reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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7 authors.
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Abstract
backgroundWe describe a patient with a "northwest" cardiac axis and electrocardiographic features of right ventricular (RV) pressure overload in the setting of Fontan circulation. TAKE-HOME MESSAGES: In atrioventricular canal defects with Fontan circulation, a northwest cardiac axis on electrocardiography reflects altered RV activation and remodeling, often persisting from childhood into adulthood and secondary to RV outflow tract obstruction. CASE SUMMARY: A 28-year-old woman presented for routine medical follow-up. Medical history was notable for Fontan procedure, with the last operation performed 12 years earlier, followed by an unspecified percutaneous cardiac intervention. Electrocardiography demonstrated frontal QRS axis between -90° and ±180°, with RV pressure overload. Physical examination revealed a pansystolic murmur audible over the tricuspid and mitral areas, digital clubbing, and an oxygen saturation of 85%. Laboratory evaluation showed a hemoglobin level of 19 g/dL and hematocrit of 62%.
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