Ivosevic T, et al. - The researchers undertook this retrospective study to define the incidence and the risk factors for intraoperative bradycardia in maxillofacial, ear, nose and throat surgery, as well as to determine whether controlled hypotension affects the occurrence of intraoperative bradycardia (IOB). In maxillofacial, ear, nose and throat surgery, IOB was frequently noted, especially in male, older age, and patients with ishemic heart disease. Factors increased the risk for occurrence of IOB were ear surgery, longer anesthesia duration, and controlled hypotension.

Methods

• A total of 2,304 patients who underwent maxillofacial, ear, nose or throat surgery were included in this study.
• The influence of sex, age, comorbidity, type of surgery, duration of anesthesia and controlled hypotension on the occurrence of IOB were analyzed.

Results

• The researchers registered IOB in 473 patients (20.5%).
• A significantly frequent occurrence of IOB was found in patients with controlled hypotension than patients without controlled hypotension (33.9 vs 15.1%) (p=0.000).
• Age (OR = 1.158; 95% CI = 1.068–1.256; p=0.000), sex (OR = 0.786; 95% CI = 0.623–0.993; p=0.043), ischemic heart disease (OR = 2.016; 95% CI = 1.182–3.441; p=0.010); ear surgery (OR = 1.593; 95% CI = 1.232-2.060; p=0.000), anesthesia duration, (OR = 1.006; 95% CI = 1.004–1.007; p=0.000) and controlled hypotension (OR = 2.204; 95% CI = 1.761–2.758; p=0.000) were the significant predictors of IOB.