TAN CHEN WU
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina - Médico
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- Late Outcome of a Randomized Study on Oral Magnesium for Premature Complexes(2014) FALCO, Cristina Nadja M. Lima De; DARRIEUX, Francisco Carlos da Costa; GRUPI, Cesar; SACILOTTO, Luciana; PISANI, Cristiano F.; LARA, Sissy; RAMIRES, Jose A. F.; SOSA, Eduardo; WU, Tan Chen; HACHUL, Denise; SCANAVACCA, MauricioBackground: Ventricular and supraventricular premature complexes (PC) are frequent and usually symptomatic. According to a previous study, magnesium pidolate (MgP) administration to symptomatic patients can improve the PC density and symptoms. Objective: To assess the late follow-up of that clinical intervention in patients treated with MgP or placebo. Methods: In the first phase of the study, 90 symptomatic and consecutive patients with PC were randomized (double-blind) to receive either MgP or placebo for 30 days. Monthly follow-up visits were conducted for 15 months to assess symptoms and control electrolytes. 24-hour Holter was performed twice, regardless of symptoms, or whenever symptoms were present. In the second phase of the study, relapsing patients, who had received MgP or placebo (crossing-over) in the first phase, were treated with MgP according to the same protocol. Results: Of the 45 patients initially treated with MgP, 17 (37.8%) relapsed during the 15-month follow-up, and the relapse time varied. Relapsing patients treated again had a statistically significant reduction in the PC density of 138.25/ hour (p < 0.001). The crossing-over patients reduced it by 247/ hour (p < 0.001). Patients who did not relapse, had a low PC frequency (3 PC/ hour). Retreated patients had a 76.5% improvement in symptom, and crossing-over patients, 71.4%. Conclusion: Some patients on MgP had relapse of symptoms and PC, indicating that MgP is neither a definitive nor a curative treatment for late follow-up. However, improvement in the PC frequency and symptoms was observed in the second phase of treatment, similar to the response in the first phase of treatment.