![]() |
|||
|
|||
High-dose atorvastatin for stroke preventionStatins, in general, are widely accepted as appropriate
treatment for those with cardiovascular and cerebrovascular risk factors. In
this report, the results of treatment with high-dose atorvastatin (80 mg/day) vs
placebo are assessed in patients who have had a recent stroke or transient
ischaemic attack (TIA). Unsurprisingly, 80 mg of atorvastatin per day reduced
the overall incidence of strokes and of cardiovascular events, but there was a
small increase in the incidence of haemorrhagic stroke.
An accompanying editorial was critical of the patient
inclusion criteria and remarked that “the absolute benefit of treatment
with atorvastatin was relatively modest.” Although the editorial
commentator was not rapt with the high-dose atorvastatin, he strongly favoured
the adoption of statin therapy into guidelines for treatment of ischaemic
stroke.
N Engl J
Med 2006;355:549–59 & 613–5
And more about statins—atorvastatin vs simvastatinStatins are one of the great success stories of preventive
medicine. Extensive evidence, excellent safety, and high efficacy have resulted
in an exponential rise in prescriptions for statins, currently increasing at 30%
a year in England. Statins represent the largest drug cost to the NHS (£78
million [Euros1.1bn; US$1.4bn] in 2004).
Similar trends in New Zealand also—simvastatin is the
second most prescribed medicine (945,783 scripts in 2005) and the total cost of
lipid-modifying agents in 2005 was over NZ$60,000,000. We, in New Zealand, use
simvastatin as it is fully funded. Atorvastatin can be obtained under special
authority—albeit, with difficulty.
The author of this paper advocates the replacement of
atorvastatin with simvastatin. In support, he quotes a head-to-head comparison
of atorvastatin and simvastatin, which although underpowered, showed no
difference between the drugs. And a meta-analysis of clinical trials using
simvastatin 40 mg and atorvastatin 10 mg and 20 mg showed no significant
differences in mortality, death from coronary heart disease, or stroke. And the
punchline—using generic simvastatin as first line could save £2bn
over five years in England.
PS—Paradoxically, in New Zealand, 40 mg of simvastatin
is more expensive than 10 mg of atorvastatin.
BMJ
2006;332:1344–5
C-reactive protein (CRP) and cardiovascular diseaseCRP, the classical acute-phase protein, is well known as a
marker of inflammation and tissue damage. It is commonly used to detect subtle
inflammation and some believe that it is predictive of impending myocardial
infarction.
In this report, British researchers assert that CRP binds to
ligands exposed in damaged tissue and then activates complement and increases
myocardial infarct size in rats subjected to coronary artery ligation. They have
developed a specific small-molecule inhibitor of CRP which abrogates the
increase in infarct size and cardiac dysfunction produced by injection of human
CRP.
Excellent, but, only in rat experiments! However, you have
to start somewhere.
Nature
2006;440:1217–21
Use it or lose it—againObservational studies have shown that older adults who
report low physical activity levels are at elevated risk of mortality compared
with those who report moderate or high levels of activity.
So what about the reverse? Does activity prolong life? An
international gerontology study group documented the free-living activity energy
expenditure in 302 high-functioning, community-dwelling older adults (aged
70–82 years). And you guessed it—those elderly US adults, who burned
more energy, had a significant lower risk of death over a mean follow-up of six
years.
Very encouraging for the healthy elderly, but unhelpful for
those who cannot burn energy because of ill health.
JAMA
2006;296:171–9
Emerging emergency-medicine crisisOvercrowding, hospital-bed shortages, and lack of specialist
coverage in many emergency departments is a frequently heard theme, not only in
New Zealand but elsewhere. Why? For a variety of reasons but the most compelling
is that these departments provide far more than just urgent care for trauma and
medical emergencies. Increasingly, they are called on to offer services that in
the past were provided by personal physicians. As a result, emergency department
staff and resources are often stretched to the limit.
Apparently it is particularly bad in the USA where it is
sometimes necessary to direct ambulances to other facilities farther away,
putting critically ill patients at increased risk.
In some respects, the situation in the USA is unique.
Because 41 million people (about one in seven) have no health insurance, many
seek help in emergency departments when they need medical care.
Lancet 2006;367:2033
|
|||
| Current
issue | Search journal |
Archived issues | Classifieds
| Hotline (free ads) Subscribe | Contribute | Advertise | Contact Us | Copyright | Other Journals |