SciELO - Scientific Electronic Library Online

vol.20 issue3Standardization of the sodium heparin dose used in off-pump myocardial revascularization surgeryPredictors of perioperative myocardial infarction in surgical myocardial revascularization author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Brazilian Journal of Cardiovascular Surgery

Print version ISSN 0102-7638On-line version ISSN 1678-9741


LEAL, João Carlos F. et al. Impact of serum troponin I in the long-term evolution of patients submitted to resynchronization with biventricular stimulation: follow-up of up to 59 months. Rev Bras Cir Cardiovasc [online]. 2005, vol.20, n.3, pp.286-290. ISSN 0102-7638.

OBJECTIVE: To analyze the evolution and prognostic influence of the cardiac troponin I serum levels in patients with congestive heart failure (CHF) submitted to interventricular resynchronization (VR) over a 59-month follow-up period. METHOD: Thirty-three patients with idiopathic dilated myocardiopathy in NYHA functional classes III and IV were submitted to VR. The pre- and post-operative quality of life (QV) was analyzed using the Minnesota Code and the left ventricle function was assessed by echocardiography. The cardiac troponin I levels were compared in 23 patients utilizing the Fisher exact test to analyze the correlation with death and the Kaplan-Meier curve was used to analyze the survival rate. RESULTS: The QV was better after VR with a median of 73 points in the pre-operative period and 36 in the postoperative period (p-value < 0.0001). The left ventricle diastolic diameter (LVDD) reduced from 65 mm in the preoperative period to 60 mm in the postoperative period (p-value = 0.0014) with an increase in the ejection fraction from 37 to 47% (p-value = 0.0004). In 15 patients with normal cardiac troponin I levels, no deaths occurred and of the 8 patients with high levels, six died (p-value = 0.0003). The actuarial survival curve showed a survival rate of 47.1 ± 13.3% at the end of 59 months. CONCLUSION: VR in patients with CHF improves the QV and echocardiographic parameters (ejection fraction and LVDD). It is a good alternative for functional class III and IV patients. The serum levels of cardiac troponin I are predictors of risk to life.

Keywords : Troponin; Arrhythmia; Heart failure [congestive]; Pacemaker [artificial].

        · abstract in Portuguese     · text in English | Portuguese     · English ( pdf epdf ) | Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License