title: Prolonged Q-Tc interval and decreased lymphocyte magnesium in congestive heart failure.
abstract: Lymphocyte Mg concentration was measured in 2 patients with congestive heart failure, on long-term diuretic treatment, and was found to be lower than normal. The patients exhibited prolonged Q-Tc intervals on ECG analysis. During treatment with Mg sulfate, the Q-Tc interval normalized as the lymphocyte Mg approached control values. An Mg-sparing diuretic was added to the therapeutic regimen.
mesh_terms: D000368:Aged; D004562:Electrocardiography; D006321:Heart / Q000503:physiopathology*; D006333:Heart Failure / Q000097:blood* / Q000503:physiopathology; D006801:Humans; D008214:Lymphocytes / Q000378:metabolism*; D008274:Magnesium / Q000378:metabolism*; D008297:Male; D011188:Potassium / Q000097:blood
chemical_list: D008274:Magnesium; D011188:Potassium