Linked Life Data

17413553

Source:http://linkedlifedata.com/resource/pubmed/id/17413553

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2007-4-6
pubmed:abstractText
The regulation of myocardial electrolyte concentrations is critical to proper cardiac function. Myocardial ischemia is associated with deranged ion transport. Left ventricular assist device (LVAD) therapy improves myocyte bioenergetics in chronic heart failure (CHF), which may manifest as electrolyte alterations; however, rapid electrolyte shifts may place critically ill patients at risk for arrhythmias upon initiation of LVAD support. We examine the effect of incremental increases in LVAD support on acute changes in myocardial arteriovenous electrolytes in CHF. CHF was induced in sheep via coronary microembolization. Four months later, sheep underwent acute LVAD implantation. LVAD support was incrementally increased (0%, 25%, 50%, 75% support). Paired arterial and coronary sinus blood samples were obtained at each increment and analyzed for K+, Ca2+, and Na+ concentrations. Arteriovenous electrolyte concentrations (mmol/l) were inverted in CHF before LVAD support: K+ (-0.08), Ca2+ (-0.04), and Na+ (0.04). These imbalances were corrected within 20 minutes and with as little as 25% LVAD support: K+ (0.06), Ca2+ (0.012), and Na+ (-0.80). The arteriovenous differences further widened as LVAD support was increased. In conclusion, LVAD support in CHF induces acute alterations in myocardial electrolytes. Rapid shifts myocardial arteriovenous electrolyte balances during LVAD support may in part explain the incidence of post-LVAD arrhythmias observed clinically in humans.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1538-943X
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
152-8
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:articleTitle
Left ventricular assist device support induces acute changes in myocardial electrolytes in heart failure.
pubmed:affiliation
Department of Anesthesiology, The Ohio State University Medical Center, Columbus, Ohio 43210-1228, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't