Abstract:
BACKGROUND:Orthostatic hypotension (OH) is common amongst the older population and is associated with morbidity and mortality. We sought to investigate predictors of OH to assist the clinician in identifying patients at risk. METHODS AND RESULTS:Database of 2696 patients attending a transient ischaemic attack (TIA) clinic between January 2006 and May 2009 was examined. Logistic regression models were constructed to determine clinical associates of OH. Demographics, co-morbidities, cardiovascular risk factors and medications were included in the multivariate models. Simple data mining models in the form of rule sets were developed for each component and they were assessed for predictive accuracy. The best models were validated on a smaller sample. Prevalence of OH was 22.3% in the TIA clinic population (50.6% men, mean 72 years; 49.4% women, mean 75 years). A significant postural drop in systolic blood pressure (BP) (≥ 20 mmHg) was more prevalent than a significant diastolic BP drop (≥ 10 mmHg). Isolated systolic hypertension was common (52.4%). Common factors predicting a significant systolic and diastolic BP fall were older age, previous TIA, being a current smoker, having diabetes and the use of beta-blockers. Both mean arterial and pulse pressure (MAP and PP) derived from supine BP were significantly associated with OH. CONCLUSIONS:OH should be assessed routinely in TIA clinics. MAP and PP may provide information on the predictability of OH.
journal_name
Blood Pressjournal_title
Blood pressureauthors
de la Iglesia B,Ong AC,Potter JF,Metcalf AK,Myint PKdoi
10.3109/08037051.2012.732780subject
Has Abstractpub_date
2013-04-01 00:00:00pages
120-7issue
2eissn
0803-7051issn
1651-1999journal_volume
22pub_type
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