Determinaciones de niveles de creatina y lípidos mediante espectroscopia por resonancia magnética en miocardio de pacientes con insuficiencia cardiaca no isquémica / Myocardial lipids and creatine measured by magnetic resonance spectroscopy among patients with heart failure
Rev. méd. Chile
;
138(12): 1475-1479, dic. 2010. ilus, tab
Article
in Spanish
| LILACS
| ID: lil-583042
ABSTRACT
Background:
Heart failure (HF) is characterized, among other features, by the development of alterations in myocardial energy metabolism, involving a decrease in glucose utilization and increased free fatty acid uptake by cardiomyocytes, associated with decreased deposits of high-energy phosphates (creatine phosphate/ creatine transporter). Magnetic resonance (MR) imaging allows a direct and noninvasive assessment of myocardial metabolites.Aim:
To measure myocardial creatine and lipids by MR spectroscopy among patients with HF. Material andMethods:
Cardiac MR spectroscopy (1.5 Tesla) with Hydrogen antenna and single voxel acquisition was performed in fve patients with non-ischemic heart failure, aged 58 ± 9.7 years, (60 percent males) and 5 healthy volunteers matched for age and sex. We analyzed the signals of creatine (Cr), lipids (L) and water (W) in the interventricular septum, establishing the water/lipid (W/L) and water/creatine (W/Cr) index to normalize the values obtained.Results:
Among patients, left ventricular ejection fraction was 32 ± 6.9 percent, 60 percent were in functional capacity II, 60 percent had hypertension and one was diabetic. Spectroscopic curves showed a depletion of total Cr, evidenced by the W/ Cr index, among patients with heart failure, when compared with healthy controls (1.46 ± 1.21 and 5.96 ± 2.25 respectively, p < 0,05). Differences in myocardial lipid content, measured as the W/L index, were not significant (5.06 ± 2.66 and 1.80 ± 1.62 respectively, p = 0.08).Conclusions:
Among patients with heart failure of non-ischemic etiology, there is a depletion of creatine levels measured by MR spectroscopy.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Magnetic Resonance Spectroscopy
/
Creatine
/
Heart Failure
/
Lipids
/
Myocardium
Type of study:
Observational study
/
Risk factors
Limits:
Female
/
Humans
/
Male
Language:
Spanish
Journal:
Rev. méd. Chile
Journal subject:
Medicine
Year:
2010
Type:
Article
/
Project document
Affiliation country:
Chile
Institution/Affiliation country:
Hospital DIPRECA/CL
/
Pontificia Universidad Católica de Chile/CL
/
Universidad de Chile/CL
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