Extraction bradycardia: a pilot case-crossover study.

PURPOSE: Significant vasovagal reaction is one of the untoward events in the course of simple extractions. The present study then aimed to record the patients' heart rate during the extraction procedure.

MATERIALS AND METHODS: Informed consents were obtained in advance. Patients were placed in the dental chair and their heart rate was measured before /and prior to the anesthetic injection, during, and after dental extraction on a pulse oxymeter device. Data were analyzed using paired t-test.

RESULTS: Sixty one patients were included. The mean heart rates of these patients prior, during, and after extraction were 88, 86 and 81, respectively. Two by two comparisons showed a significant decrease in the mean heart rate during extraction compared to the baseline and also after extraction compared to both before and during extraction (p < 0.05 for all three).

CONCLUSIONS: Despite the presence of sufficient local anesthesia and performing the extraction with the least trauma, a significant decrease in heart rate is evident.