Cognitive Impairment in Heart Failure: Issues of Measurement and Etiology
Key result
Cognitive impairment was detected in 28.6% of heart failure patients, with the Draw-a-Clock Test identifying impairment in 50% of affected patients.
Why the study?
What is the prevalence of cognitive impairment in heart failure patients, and which screening tools are most useful for detection?
Population
42 patients with heart failure
Design
Cross-sectional
Authors
Discussion
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Member takes
Implication
May support cognitive screening in heart failure; leaves open optimal tool validation and outcome impact.
Study Design
Type
Cross-Sectional (n=42)
Structured PICO
What is the prevalence of cognitive impairment in heart failure patients, and which screening tools are most useful for detection?
P
Population
42 patients with heart failure
I
Intervention
4 screening measures of cognition (Commands subtest and Complex Ideational Material subtest of the Boston Diagnostic Aphasia Examination, Mini-Mental State Examination, and Draw-a-Clock Test)
O
Outcome
Cognitive impairment (defined as performance less than the standardized T-score cutoff point on at least 1 of the 4 measures) and its correlates (age, education, hypotension, fluid overload, and dehydration)surrogate
Cognitive impairment is relatively common in heart failure patients, and the Draw-a-Clock Test is a useful screening tool, though it should not be used as the sole method.
Limitations
- The Draw-a-Clock Test cannot be used to detect problems with verbal learning or delayed recall and should not be used as the sole screening method.
Cite This Study
Riegel et al. (2002) conducted a cross-sectional in Heart failure (n=42). Cognitive screening measures (Commands subtest, Complex Ideational Material subtest, Mini-Mental State Examination, Draw-a-Clock Test) was evaluated on Cognitive impairment (performance less than the standardized cutoff point on at least 1 of the 4 measures). Cognitive impairment was detected in 28.6% of heart failure patients, with the Draw-a-Clock Test identifying impairment in 50% of affected patients.