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Revista chilena de cardiología

versión On-line ISSN 0718-8560

Resumen

MASSARDO, Teresa et al. Value of left ventricular excentncity index obtained by myocardial perfusion tomography. Rev Chil Cardiol [online]. 2011, vol.30, n.2, pp.132-139. ISSN 0718-8560.  http://dx.doi.org/10.4067/S0718-85602011000200006.

Background: The Eccentricity Index (EI) obtained with myocardial SPECT allows adequate assessment of left ventricular shape in pathological myocardial remodeling. Aim: To compare EIs in adults with different cardiac conditions. Methods: 170 patients were studied. Group I (n=44) were control subjects with >2 cardiovascular risk factors not including Diabetes Mellitus (DM); Group II (n=41) had type II DM. Patients in both groups were asymptomatic without known coronary artery disease or wall motion abnormalities. Group III (n=64) had seg-mental wall motion abnormality and/or myocardial infarction; Group IV (n=21) included patients with dilated ventricles and diffuse abnormal wall motion. We used gated 99mTc Sestamibi SPECT and QGS processing (EI sphere ^0). Results: Left ventricular ejection fraction was significantly higher and end diastolic volumes lower in Groups I and II than in Groups III and IV. Resting EI was 0.889±0.003 in Group I, 0.873±0.03 in Group II, 0.846±0.04 in Group III and 0.820±0.06 in Group IV. Groups I and II had significantly higher EI, compared to Groups III and IV. The EI was lower in groups with abnormal wall motion compared to those without it (p<0.001). No patient in Group I with a normal LV function had an EI <0.82. EI obtained post stressed behaved in a way similar to resting EI in all groups. Conclusion: Myocardial perfusion SPECT EI differs in patients with and without left ventricular morphological changes and could be helpful in the evaluation of left ventricular remodeling.

Palabras clave : Left ventricular shape; Eccentricity index; miocardial SPECT.

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