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Can Ginkgo prevent cognitive decline in older adults?Ginkgo biloba is marketed widely in the USA and elsewhere
and used with the hope of improving, preventing, or delaying cognitive
impairment associated with aging and neurodegenerative disorders such as
Alzheimer disease.
Previous controlled trials have found Ginkgo to be
ineffective in the prevention of, or deterioration of, cognitive decline in
subjects with Alzheimer disease. This study randomised 3069 elderly (72–96
years) subjects with normal cognition to 120mg of Ginkgo twice daily or placebo.
After a median follow-up of 6.1 years it was concluded that Ginkgo did not
result in less cognitive decline.
JAMA
2009;302(24):2663–70.
Total health care expenditure as percentage of GDP (gross domestic product) in the Czech Republic—a comparison with the rest of usThis commentary discusses a paradox that exists—Czech
health statistics are comparable with other developed countries but their GDP%
spent on health is the lowest—6.8% in 2006. In the same year, other
European countries had figures ranging from 8.5% for the UK to 11% for France.
You will not be surprised to find that the comparable figure for the USA was
about 15.5%. So the Czech system, which features fees per service (doctor visit,
prescription, and day fees for hospitalisation) may, or may not, be worth
considering. The 6.8% of GDP spent on health in the Czech Republic is low, but
not as low as the NZ figure—recently reported as 6.3% (public
expenditure).
Lancet
2010;375:179–81.
Postoperative risk of venous thromboembolism in middle-aged women (50–64 years)This study involved 947,454 middle-aged women in the UK who
were involved in the Million Women Study between 1996 and 2001. During
follow-up, 239,614 were admitted to hospital for inpatient or day case surgery;
as well, 5689 women were admitted to hospital or died from venous
thromboembolism. The findings were that those having surgery were 70 times more
likely to suffer thromboembolism. The risk peaked at 3 weeks postoperatively but
was still substantial at 12 weeks. Somewhat as expected but the 12-week
observation is disconcerting. The risks varied substantially by type of surgery,
being greatest after operations for cancer and for hip or knee replacement.
Unfortunately data on postoperative thromboembolic prophylaxis was not
available. This would have been very useful. Anyway, the message would appear to
be that in high-risk cases prophylaxis should be given for 12 weeks? We assume
that middle-aged men would be similarly affected?
BMJ 2010;340:32.
A nurse-led anterior circulation TIA clinicThis report from St Mary’s Hospital in London points
out that an estimated 23% of ischaemic strokes are preceded by a transient
ischaemic attack (TIA), with the cumulative risk of stroke after TIA from the
Oxford series being 8% at 7 days, 11.5% at 30 days, and 17.3% at 90 days. As
stroke prevention is the aim, early evaluation of such patients is essential.
The numbers are overwhelming the ability of the UK neurology services to see
such patients urgently. Hence this initiative—specially trained
neurovascular specialist nurses run what is called the FAST (face,arm,speech
test) TIA clinic at St Mary’s.
The acronym is in recognition of the clinical presentation
of most anterior circulation TIAs. After 3 years experience (282 patients) they
report a high pick-up rate of 86% of neurovascular events (national average
about 55%). The median time from referral to clinic was 3 days and one-third
were seen within 24 hours. Sounds good.
Postgrad Med J
2009;85:637–42.
Angiotensin-converting enzyme inhibitors (ACEI) or angiotensin II-receptor blockers (ARB), or both, for ischaemic heart diseaseBoth classes of drugs are known to have established benefit
in patients with heart failure and those who have had a myocardial infarction
with ventricular dysfunction. Their use, however, in patients with preserved
ventricular function is less certain.
This paper attempts to resolve this by a systematic review
of 41 relevant studies. The conclusion was that adding ACE inhibitor to standard
medical therapy improves outcomes, including reduced risk for mortality and
myocardial infarctions (relative risks 0.87 and 0.83 respectively) in patients
with ischaemic heart disease with preserved ventricular function. Less evidence
supports a benefit of ARB therapy, and combination therapy seems no better than
ACE inhibitor therapy alone and increases harms. In particular, treatment
withdrawal from combined therapy because of hypotension and syncope.
Ann Intern Med
2009;151:861–71.
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