ISSN:
1540-8159
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
Aim: The aim of this article is to examine whether cardiac resynchronization therapy (CRT) induces improvements in the neurohumoral system. Methods and Results: Thirteen patients with HF (left ventricular (LV) ejection fraction 〈35%) were included. Before and after 6 months of CRT, myocardial 123I-metaiodobenzylguanidine (123I-MIBG) uptake indices, used as an index of neural norepinephrine reuptake and retention, and brain natriuretic peptide (BNP) levels, used as an index of LV end-diastolic pressure, NYHA classification and echocardiographic indices were assessed. Six months of CRT resulted in significant improvement in (1) NYHA classification and reduction in QRS width (P 〈 0.001), (2) decrease of LV end-diastolic diameter (P = 0.005), LV end-systolic diameter (P = 0.005), septal to lateral delay (P = 0.01) and mitral regurgitation (MR, P = 0.04), (3) delayed 123I-MIBG heart/mediastinum ratios improved (P = 0.03) and 123I-MIBG washout decreased (P = 0.001), and (4) BNP levels decreased (P = 0.001). Conclusions: Parallel to significant functional improvement and echocardiographic reverse remodeling and resynchronization, our data indicate that CRT induces favorable changes in the neurohumoral system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1540-8159.2005.09508.x
Permalink