Musical auditory stimulation influences heart rate autonomic responses to endodontic treatment

• Grant number: 16/23504-2
• Support Opportunities: Regular Research Grants - Publications - Scientific article
• Start date: February 01, 2017
• End date: July 31, 2017
• Field of knowledge: Health Sciences - Speech Therapy
• Principal Investigator: Vitor Engrácia Valenti
• Grantee: Vitor Engrácia Valenti
• Host Institution: Faculdade de Filosofia e Ciências (FFC). Universidade Estadual Paulista (UNESP). Campus de Marília. Marília , SP, Brazil

Abstract

We aimed to evaluate the acute effect of musical auditory stimulation on heart rate autonomic regulation during endodontic treatment. 50 subjects from either gender between 18 and 40 years old, diagnosed with irreversible pulpitis or pulp necrosis of the upper front teeth and endodontic treatment indication. HRV was recorded 10 minutes before (T1), during (T2) and immediately (T3 and T4) after endodontic treatment. The volunteers were randomly divided into two equal groups: exposed to music or, not exposed to music. The group exposed to music listened to music during T2, T3 and T4. We found no difference regarding salivary cortisol and anxiety score. In the group with musical stimulation heart rate decreased in T3 compared to T1 and mean RR interval increased in T2 and T3 compared to T1. SDNN (standard deviation of all normal RR intervals) and TINN (triangular interpolation of RR intervals histogram) indices decreased in T3 compared to T4, the RMSSD (root-mean square of differences between adjacent normal RR intervals) and SD1 (standard deviation of the instantaneous variability of the beat-to-beat heart rate) increased in T4 compared to T1, the SD2 (standard deviation of long-term continuous RR interval variability) increased compared to T3 and LF (low frequency band) increased in T4 compared to T1 and T3. In the control group, only RMSSD and SD1 increased in T3 compared to T1. Musical auditory stimulation enhanced heart rate autonomic modulation during endodontic treatment. (AU)