Perioperative changes in magnesium after thoracic surgery Meeting Abstract


Authors: Amar, D.; Toth, C.; Fleisher, M.; Downey, R. J.
Abstract Title: Perioperative changes in magnesium after thoracic surgery
Meeting Title: CHEST World Congress 1996
Abstract: Purpose: Supraventricular dysrhythmias (SVD) after non-cardiac thoracic surgery occur in 10%-25% of patients and have been attributed to acute decrements in serum magnesium (Mg+2). Actual data on alterations in serum Mg+2 concentrations after lung resection are sparse. Methods: We studied 16 patients scheduled for major pulmonary resection. Excluded were patients receiving β-blockers or Ca+2-antagonists. Heparinized arterial blood samples for serum Mg+2 and Ca+2 (for comparison) were obtained before surgery (PRE), on arrival to the post-anesthesia care unit (PACU) and on the morning of postoperative day (POD) 1. Data (mean±SD) were analyzed using a Student t-test and P <0.05 was considered significant. Results: Of the 16 patients (8M/8F) aged 65±15 yr., 15 had undergone a lobectomy and one a pneumonectomy. When compared to baseline, there were no significant differences in serum magnesium or calcium postoperatively (Table). PRE PACU POD1 Mg+2 (mmol/L) 0.8±0.1 0.7±0.1 0.8±0.1 Ca+2 (mmol/L) 2.2±0.1 2.1±0.1 2.1±0.1 Conclusions: Serum concentrations of Mg+2 and Ca+2 did not change significantly within 24h of major thoracic surgery. These preliminary data do not support an important contribution of decreases in serum Mg+2 to SVD generation. However, because SVD often occur 24-48 hours after thoracic surgery, future studies may explore whether Mg+2 alterations later in the postoperative period are associated with an increased incidence of SVD.
Journal Title: Chest
Volume: 110
Issue: 4 Suppl.
Meeting Dates: 1996 Oct 27-31
Meeting Location: San Francisco, CA
ISSN: 0012-3692
Publisher: American College of Chest Physicians  
Date Published: 1996-10-01
Start Page: 215S
Language: English
PROVIDER: scopus
DOI: 10.1378/chest.110.4_Supplement.210S
PUBMED: 8885851
DOI/URL:
Notes: Meeting Abstract -- Export Date: 22 November 2017 -- Source: Scopus
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MSK Authors
  1. David Amar
    137 Amar
  2. Robert J Downey
    254 Downey
  3. Martin Fleisher
    312 Fleisher