Complexo Hospitalario Universitario A Coruña, Spain.
Am J Hypertens. 2010 Oct;23(10):1089-94. doi: 10.1038/ajh.2010.137. Epub 2010 Jul 1.
The aim of this study was to determine the concordance between two instruments for measuring blood pressure (BP) and its modification due to the presence or absence of atrial fibrillation (AF).
In 107 patients with AF and a sinus rhythm (SR) of 100, BP was recorded using two sphygmomanometers: one automatic and the other manual. Four readings were made with each at 5-min intervals, and the mean was calculated for the statistical calculations. The correlation was determined using Pearson's correlation coefficient, and the concordance using the Bland-Altman plot and the κ index.
The correlation coefficients (r) for the systolic (SBP) and diastolic BP (DBP) were 0.92 and 0.76. If the patient had AF, these were 0.91 and 0.75, respectively. The difference between the automatic and manual SBP measurements depending on whether the patient presented AF was -0.21 and -1.03 mm Hg. In DBP, this was -4.61 and 0.44 mm Hg. This discordance is not modified for low or high BP values, both in patients with AF and those without it. If we classify the patients as hypertensive or not (≥140/90 mm Hg), the concordance between both methods has high κ indices (0.72 and 0.89) both in AF and SR.
There is a high correlation between both measurements, which decreased slightly in patients with AF. The difference when comparing the means is clinically irrelevant, and there is a substantial level of concordance between the two measurements for classifying patients as hypertensive or not.
本研究旨在确定两种血压（BP）测量仪器及其因是否存在心房颤动（AF）而发生的变化之间的一致性。
在 107 例 AF 患者和 100 例窦性节律（SR）患者中，使用两种血压计记录 BP：一种自动血压计，另一种手动血压计。每 5 分钟测量四次，取平均值进行统计计算。使用 Pearson 相关系数确定相关性，使用 Bland-Altman 图和κ指数确定一致性。
收缩压（SBP）和舒张压（DBP）的相关系数（r）分别为 0.92 和 0.76。如果患者患有 AF，则分别为 0.91 和 0.75。自动和手动 SBP 测量之间的差异取决于患者是否患有 AF，分别为-0.21 和-1.03 mmHg。在 DBP 中，这分别为-4.61 和 0.44 mmHg。这种差异不因 AF 或非 AF 患者的 BP 值高低而改变。如果我们将患者分类为高血压或非高血压（≥140/90mmHg），则两种方法之间的一致性具有较高的κ指数（0.72 和 0.89），无论是在 AF 还是 SR 中。
两种测量方法之间存在高度相关性，在 AF 患者中略有下降。比较平均值时的差异在临床上无足轻重，两种测量方法在将患者分类为高血压或非高血压方面具有相当高的一致性。
