Automated office blood pressure measurement with the assistance of an instructional video in patients with hypertension

Abstract

Objectives Automated office blood pressure (AOBP) measurement often requires assistance. Accompanied by an instructional video, AOBP measurement could be performed independently by patients. Design and methods Seventy-five patients with hypertension were enrolled. AOBP was measured three times at 1-min intervals after 5 min of rest by an automated BP measurement device with the assistance of an animated instructional video. The video was designed originally to instruct patients on the way to measure BP appropriately. Perceived stress was evaluated using a questionnaire after the AOBP measurement. Office BP was measured three times using the same device. Home BP measurement was performed on 5 consecutive days. Results The mean age of the patients was 74.5 ± 10.6 years, and 96% were taking antihypertensive drugs. Mean AOBP, office BP and home BP measurements were 135.2 ± 17.2/81.3 ± 11.1, 139.3 ± 16.3/78.6 ± 10.9 and 129.2 ± 16.7/72.7 ± 8.9 mmHg, respectively. Regarding SBP, the mean AOBP was significantly lower than office BP (P = 0.005) and higher than home BP (P = 0.004). The differences in SBP and DBP between AOBP and home BP measurements were significantly related to patients’ perceived stress when performing AOBP measurements (r = 0.289; P = 0.013 and r = 0.328; P = 0.004). In a multivariate analysis, patients’ perceived stress was a significant predictor of the difference between AOBP and home BP (P = 0.013), even after adjusting for age, sex, BMI and mean of AOBP and home BP. Conclusion AOBP values measured with the assistance of an instructional video were between conventional office and home BP measurements. Perceived stress during AOBP measurement was related to the difference in AOBP from home BP.