Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5984163 | Journal of Cardiology | 2013 | 5 Pages |
Strain rate (SR) and strain (É) in tissue Doppler imaging provide new noninvasive measurements of myocardial function, independent of heart motion.This study assesses the extent of peri-patch regional myocardial function after patch repair of ventricular septal defect (VSD).Myocardial SR and É were recorded from the peri-patch myocardium and remote septum from patch area in 18 patients (1 month to 4 years of age, mean 2.3 years). Distance between the patch and the point of returning to remote normal strain (É) profile was measured.Compared to the remote myocardial region, peri-patch myocardium had decreased peak longitudinal SR (â3.8 ± 2.1 sâ1 vs. â5.3 ± 3.3 sâ1, p < 0.05), delayed time to peak longitudinal SR (144 ± 59 ms vs. 110 ± 46 ms, p < 0.05), decreased peak É (longitudinal, â20.8 ± 8.1% vs. â28.7 ± 11.1%; radial, 20.1 ± 16.3% vs. 34.3 ± 22.4%, p < 0.01), and delayed time to peak É (longitudinal, 314 ± 80 ms vs. 241 ± 63 ms; radial, 329 ± 99 ms vs. 265 ± 78 ms, p < 0.0001).The mean distance from the patch to the remote patch É curve was 2.55 ± 0.77 mm.ConclusionPeri-patch myocardium after repair of VSD has delayed and diminished contraction as compared to more remote normal myocardium.