ABSTRACT
OBJECTIVE: To report the frequency and types of electrocardiographic alterations in patients with leptospirosis in the first 24 hours of hospitalization. METHODS: We analyzed the electrocardiograms of 157 patients admitted to the Hospital Couto Maia in the city of Salvador, in the State of Bahia, Brazil, from March 1998 to June 1999. The electrocardiograms were performed in the first 24 hours after hospital admission, independent of the clinical manifestations of the patients. RESULTS: The mean ± SD for patients' age was 35.5± 13.7 (median = 32) years, and jaundice was present in 95.5 percent of them. Alterations in the electrocardiogram were detected in 68.2 percent (107/157) of the patients (95 percent confidence interval = 60.6 percent - 75.1 percent). Atrial fibrillation was the most frequent arrhythmia, occurring in 10.8 percent (17/157) of the patients. Other frequent findings were alterations in ventricular repolarization detected in 38.9 percent (61/157) of patients and first-degree atrioventricular block in 10.2 percent (16/157). The patients with atrial fibrillation were older and had higher levels of creatinine and aminotransferases. CONCLUSION: In this sample, approximately 2/3 of the patients had electrocardiographic alterations after hospital admission. Of the major arrhythmias, atrial fibrillation was the most frequent, and the patients with this arrhythmia had evidence of more severe disease. The relation between the presence and type of electrocardiographic alteration and the prognosis of leptospirosis is yet to be assessed