Spinal manipulation effect on pain and cardiac autonomic modulation in patients with rotator cuff tendinopathy: a pilot study
Introduction: there are few studies that propose to identify the relationship of Vertebral Manipulation (MV) on pain and cardiac autonomic modulation, especially in subjects with rotator cuff injury. Objective: To analyze the effect of chest pain and MV on cardiac autonomic modulation in patients with rotator cuff (TMR). Method: quasi-experimental study with a quantitative approach. Sample of 6 subjects divided into two groups: Asymptomatic (GA, n = 3) not presenting shoulder injury and pain complaints and Symptomatic Group (GS, n = 3), with rotator cuff injury. Pain assessment was performed by Visual Analog Scale (VAS) before and after handling, as well as the assessment of Heart Rate Variability (HRV) using an electrocardiogram (ECG) with 8 minutes. Chest MV was held on 4th and 5th thoracic vertebra. The analysis of HRV was relaizada in the Frequency Domain (VLF, LF, HF, LF / HF). The statistical analysis used the Wilcoxon test for comparison in the same group and the Mann Whitney test for comparison between groups, adopting a 5% significance (p <0.05). Results: There was a reduction of post handling pain, but no statistically significant difference in GS (p = 0.317). HRV GA showed a decrease VLF (p = 0.83) and increased LF variables (p = 0.51), HF (p = 0.83) and LF / HF (p = 0.51). In the GS was increased VLF variables (p = 0.83), LF (p = .83), HF (p = 0.51) and decreased variable LF / HF (p = 0.51). Conclusion: A MV upper thoracic no effect on the pain and cardiac autonomic modulation in patients with rotator cuff (TMR).