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Partial left ventriculectomy in severe idiopathic dilated cardiomyopathy: Assessment of short‐term results and their impact on late survival by magnetic resonance imaging
Author(s) -
Parga Jose R.,
Avila Luiz F.R.,
Bacal Fernando,
Moreira Luiz F.P.,
Stolf Noedir G.,
Ramires Jose A.F.,
Bocchi Edimar A.
Publication year - 2001
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1108
Subject(s) - ejection fraction , medicine , magnetic resonance imaging , cardiology , dilated cardiomyopathy , nuclear medicine , diastole , heart failure , blood pressure , radiology
We evaluated short‐term effects of partial ventriculectomy on left ventricular (LV) parameters and its impact on late survival by magnetic resonance imaging (MRI). Twenty patients and 10 normal volunteers were studied, and LV volumes (EDV, ESV), ejection fraction (EF), short‐ and long‐axis dimensions (SA, LA), wall thickness (Wth), shape (LA/SA), geometry (Wth/SA), a geometry index (Phi), and wall‐motion score index (WMSI) were evaluated pre‐ and postoperatively. Also, we compared results and survival of patients with preoperative EF ≤17% vs. EF >17%. Short‐term results showed significant changes ( P < 0.001) in: EF (17.3 ± 7.3% vs. 30.4 ± 9.5%), EDV (391.9 ± 118 vs. 272.7 ± 90 mL); ESV (308.2 ± 102.8 vs. 190.3 ± 68.4 mL); SA (80.5 ± 10.4 vs. 71.7 ± 7.8 mm); LA/SA (1.13 ± 0.1 vs. 1.34 ± 0.1); Wth (8.35 ± 0.99 vs. 9.75 ± 1.41 mm); Wth/SA (0.10 ± 0.01 vs. 0.14 ± 0.02), diastolic( 0.80 ± 0.16 vs. 0.58 ± 0.13) and systolic (0.78 ± 0.18 vs. 0.55 ± 0.12) Phi; and WMSI (−2 vs. −1) ( P = 0.032). The EF division showed differences in: LA/SA (1.26 ± 0.10 vs. 1.49 ± 0.12) ( P < 0.001); Wth/SA (0.13 ± 0.02 vs. 0.15 ± 0.02) ( P = 0.023); diastolic (0.65 ± 0.11 vs. 0.48 ± 0.11) and systolic (0.63 ± 0.09 vs. 0.46 ± 0.09) Phi ( P < 0.001); and WMSI (−2 vs. −1) ( P = 0.033). Finally, correlation between pre/postoperative EF showed for EF < 17%, r = 0.32 and for EF >17%, r = 0.83, which had different late survival. Our study showed significant changes on LV parameters after ventriculectomy. Patients with EF >17% showed better EF correlation between pre/postoperative values and higher survival rate. J. Magn. Reson. Imaging 2001;13:781–786. © 2001 Wiley‐Liss, Inc.