title: [Electrocardiographic changes in electrolyte inbalance. Part 2: Alterations in serum calcium (author's transl)].
abstract: 74 patients (hypocalcemia: 41 patients, hypercalcemia 13 patients, 20 patients as control) without heart disease were examined. A prolongation of the relative QT-interval was found in 90% and a flat or inverted T-wave in 25% of the patients with hypocalcemia. In 77% of the patients with hypercalcemia the QT-interval was shortened. A good, clinically useful correlation between the QT-interval and the serumcalcium-concentration could be established in patients with hypo- and hyper-calcemia.
mesh_terms: D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D002118:Calcium / Q000097:blood* / Q000502:physiology; D002648:Child; D004562:Electrocardiography; D005110:Extracellular Space; D006321:Heart / Q000502:physiology / Q000503:physiopathology*; D006801:Humans; D006934:Hypercalcemia / Q000503:physiopathology; D006961:Hyperparathyroidism / Q000503:physiopathology; D006996:Hypocalcemia / Q000503:physiopathology; D008875:Middle Aged; D009362:Neoplasm Metastasis; D014883:Water-Electrolyte Imbalance / Q000503:physiopathology*
chemical_list: D002118:Calcium
vernacular_title: Elektrokardiographische Untersuchungen bei Elektrolytstörungen