Device-guided slow breathing significantly increased pulse arrival time from 231.5 ms at baseline to 237.3 ms (p<0.001), indicating a reduction in blood pressure.
Does device-guided slow breathing with biofeedback increase pulse arrival time (a surrogate for blood pressure reduction) in adult patients?
Device-guided slow breathing with biofeedback significantly increased pulse arrival time, suggesting a reduction in blood pressure and demonstrating feasibility for home self-monitoring.
Tasa de eventos absoluta: 237.3% vs 231.5%
valor p: p=<0.001
OBJECTIVE: Slow breathing is a relaxation exercise recommended for lowering blood pressure (BP). Biofeedback may improve patient adherence and enhance BP lowering effects. Since the pulse arrival time (PAT) is inversely proportional to BP, it can be used to estimate BP changes. APPROACH: In this pilot study, 30 patients (age 62.9 (SD 7.7) years, 11 F/19 M, Sys. BP 133.0 (SD 17.1) mmHg, Dia. BP 83.8 (SD 10.6) mmHg) performed a device-guided slow breathing exercise. PAT was measured by ECG and plethysmography and immediately presented to the patient, and respiratory sinus arrhythmia (RSA) was calculated retrospectively to measure the adherence to the instructed respiratory rate. MAIN RESULTS: Respiratory rate was 13.6 (SD 1.9) bpm at baseline and 5.4 (SD 1.0) bpm during guided breathing. PAT continuously and progressively increased from 231.5 (SD 20.3) to 237.3 (SD 18.5) ms (p Formula: see text 0.001). The median deviation of RSA from the guided respiratory rate was 0.06 (IQR 0.19) bpm. In three patients, a deviation of > 0.20 bpm was detected, and two of them showed no increase in PAT. In total, 25 patients responded with increase in PAT. SIGNIFICANCE: In this pilot study we have shown that biofeedback of PAT and RSA are feasible and can further improve motivation and adherence. Furthermore, we have shown that the exercise increased PAT, which indicates a reduction in BP. Due to its ease of use, this method is ideal for home use and self-monitoring.
Bachler et al. (Thu,) conducted a other in Elevated blood pressure (n=30). Device-guided slow breathing exercise vs. Baseline was evaluated on Pulse arrival time (PAT) (p=<0.001). Device-guided slow breathing significantly increased pulse arrival time from 231.5 ms at baseline to 237.3 ms (p<0.001), indicating a reduction in blood pressure.