The impact of beta-blockade on right ventricular function in mitral regurgitation.
Heart Lung Circ
; 23(4): 378-80, 2014 Apr.
Article
in En
| MEDLINE
| ID: mdl-24268977
ABSTRACT
BACKGROUND:
Although mitral regurgitation (MR) results in left ventricular (LV) volume overload, right ventricular (RV) function may also be impaired. We investigated the influence of short-term beta-blockade on RV function in patients with moderate-severe MR.METHODS:
Twenty-six patients were randomised in a cross-over design to receive two weeks of beta-blockade or placebo. Echocardiography was performed at baseline and at the end of the treatment periods. Measurements included RV ejection fraction (RVEF) tricuspid annular motion and Tei index.RESULTS:
No differences in mean RVEF (64.0 ± 6.0 v 67.0 ± 8.0%, p=0.3), tricuspid annular motion (13.5 ± 3.0 v 14.7 ± 2.9 cm/s, p=0.5), or median Tei index (0.61 (0.54, 0.88) v 0.59 (0.54, 0.74), p=0.8) were observed between placebo and metoprolol, despite significantly longer cardiac time intervals. Tei index under both conditions was significantly reduced.CONCLUSIONS:
Short-term treatment with a beta-blocker did not influence RV function in these patients. Interestingly, the RV Tei index was high suggesting significant RV dysfunction despite normal RVEF.Key words
Full text:
1
Database:
MEDLINE
Main subject:
Ventricular Function, Right
/
Adrenergic beta-Antagonists
/
Mitral Valve Insufficiency
Type of study:
Clinical_trials
/
Diagnostic_studies
Limits:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
Heart Lung Circ
Journal subject:
ANGIOLOGIA
/
CARDIOLOGIA
Year:
2014
Type:
Article
Affiliation country:
China