Orthostatic hypotension in elderly women with congestive heart failure.

Abstract

Orthostatic hypotension is common in the elderly and could be the cause of impaired vision, dizziness, fainting spells and falls. To date, studies on orthostatic hypotension have chiefly concentrated on elderly patients in nursing homes, outpatients or healthy subjects. Congestive heart failure (CHF) is one of the most common causes of hospitalization and pharmacotherapy in the elderly, but little is known about the orthostatic hypotension in patients with CHF. The aim of this study was to evaluate the prevalence of orthostatic hypotension and associated symptoms in elderly females hospitalized for CHF. The study group included 36 women aged 70-100 years (mean 82.2), admitted to hospital for congestive heart failure. The control group consisted of 15 women aged 71-95 years (mean 82.5) with no symptoms of heart failure or other diseases, who underwent earlier epidemiological studies on Cracow's elderly population. In all subjects a tilt test was performed (60 degree tilt for 10 minutes) under standardized conditions (fasting patients, 12 hours after the last administration of medications, between 8:00 and 10:00 a.m.). Orthostatic hypotension was defined as a decline of 20 mmHg or more in systolic blood pressure, or 10 mmHg or more in diastolic blood pressure on assumption of the upright position. Orthostatic hypotension was detected in 83.3% of CHF women, and 43.3% of them manifested clinical symptoms associated with it. In the control group, orthostatic hypotension was noted in 53.3% of women, but none was symptomatic. In particular, the CHF patients showed a decreased ability to develop compensatory tachycardia during hypotension. Moreover, reduction in systolic blood pressure was more pronounced in CHF patients, and diastolic blood pressure increase was less significant as compared with the control group.