© 2008 European Society of Cardiology
Prognostic significance of tricuspid annular motion and plasma NT-proBNP in patients with heart failure and moderate-to-severe functional mitral regurgitation
a Unità Malattie Cardiovascolari 2, Santa Chiara Hospital Pisa, Italy
b Dipartimento di Patologia Sperimentale, Tecnologie Biomediche ed Epidemiologia, Università di Pisa Italy
* Corresponding author. Unità Operativa Malattie Cardiovascolari 2, Ospedale S. Chiara, Azienda Ospedaliera-Universitaria Pisana, Via Roma, 67-56126, Pisa, Italy. Tel.: +39 050 992355; fax: +39 050 993114. E-mail address: f.dini{at}ao-pisa.toscana.it
| Abstract |
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Background: The role of the right ventricle has been relatively neglected proportionate to its importance. We sought to evaluate the impact of right ventricular (RV) and NT-proBNP on the outcome of patients with heart failure (HF) and functional mitral regurgitation (MR).
Methods and patients: Outpatients with left ventricular (LV) systolic HF (ejection fraction [EF]
45%) and moderate-to-severe MR measured by a vena contracta width
0.5 cm were prospectively enrolled (n=142). Indexes of LV and RV function, including tricuspid annular plane systolic excursion (TAPSE), RV fractional area change and tissue Doppler RV acceleration at isovolumic contraction and NT-proBNP plasma levels were measured at the time of the index echocardiogram.
Results: Multivariate predictors of all-cause mortality included TAPSE<16 mm (hazards ratio [HR]: 2.64; p=0.009) and plasma NT-proBNP
3283 pg/ml (HR: 2.58; p=0.011). TAPSE<16mm and plasma NT-proBNP
3283 pg/ml added incremental prognostic information to LV EF
25%, NYHA classes 3–4, coronary artery disease, elderly age and male sex. The 36-month Kaplan–Meier curve showed that survival was worst in the group with TAPSE<16 mm and NT-proBNP
3283 pg/ml (p<0.0001).
Conclusion: This study demonstrates the significance of TAPSE and plasma NT-proBNP in predicting all-cause mortality in patients with systolic HF and moderate-to-severe functional MR.
Key Words: Dilated cardiomyopathy Natriuretic peptides Functional mitral regurgitation Right ventricular function Prognosis
Received November 28, 2007; Revised February 11, 2008; Accepted April 7, 2008
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