Objective To examine the reproducibility of parameters of ambulatory blood pressure measurements in the very older hypertensive patients with age≥80 years old.

Methods Fifty essential hypertensive patients with 140 mm Hg ≤ systolic blood pressure (SBP) 0.50, 24 HAPP (62.2±9.2 mm Hg vs 61.6±11.0 mm Hg p=0.54), NAPP (63.0±11.4 mm Hg vs 60.0±12.3 mm Hg p=0.06), DAPP (62.2±9.5 mm Hg vs 62.1±11.2 mm Hg p=0.94), MaxSBP (171.9±16.0 mm Hg vs 175.7±20.2 mm Hg p=0.11), MinDBP (47.4±6.5 mm Hg vs 46.4±5.8 mm Hg p=0.29), SBPL (37.2±23.4% vs 35.3±21.9%, p=0.40), DBPL (7.2±10.1% vs 6.4±8.1% p=0.50), NSBPRR (3.1±8.7% vs 5.4±9.2% p=0.12), NDBPRR (7.3±10.1% vs 7.4±9.8% p=0.95), 24HDBPV (0.16±0.04 vs 0.17±0.05 p=0.12), NSBPV (0.12±0.05 vs 0.12±0.04 p=0.98), NDBPV (0.15±0.06 vs 0.15±0.07 p=0.84), 24 HHR (68.0±8.2 bpm vs 67.1±7.8 bpm, p=0.13). The results of above parameters are not significantly different, besides 24 HSBPV (0.12±0.03 vs 0.15±0.04 p=0.01), DSBPV (0.13±0.03 vs 0.15±0.04 p=0.04), DDBPV (0.15±0.04 vs 0.17±0.05 p=0.02), which are different significantly between the first and second day.

Conclusion There was good reproducibility of ambulatory blood pressure recordings, which suggests that ambulatory blood pressure monitoring is a reliable tool to monitor blood pressure changes in the very older hypertensives.