Online
Clinical Case Study (June
2007)
Clinical
Cardiology Series
臨床心臟科個案研究
The
content of the Office Cardiology Series is provided by:
Dr. LI Siu Lung, Steven
F.H.K.A.M. (Med), F.R.C.P. (Glasg), F.R.C.P. (Edin), F.R.C.P.
(Lond), Specialist in Cardiology
Dr. WONG Shou Pang, Alexander
F.R.C.P., F.H.K.A.M.(Med.), F.H.K.C.P., Specialist in Cardiology
臨床心臟科個案研究之內容誠蒙李少隆醫生及王壽鵬醫生提供。
A 56 year old lady
came to your office for advice of hormonal replacement therapy and other preventive
measures for prevention of coronary artery disease. She is asymptomatic with
no significant coronary risk factors. Her father, who is a smoker, has coronary
artery disease diagnosed recently at age of 87.
Answers
| 1. |
Hormonal
replacement therapy confers cardiac protection in post-menopausal women.
True or False
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False.
Although there has been great enthusiasm on the use of hormonal replacement
therapy (HRT) to prevent coronary artery disease in post-menpausal women,
recent randomized control trials failed to prove its usefulness. For example,
The Heart and Estrogen/ Porgestin Replacement Study (HERS) was a randomized,
controlled trial of combined continuous HRT as a secondary prevention
in women with known coronary artery disease. In this study, the rate of
coronary events increased in the first two years and decreased in the
third and fourth year, with no net benefit over the study period. Another
other trial, the Women's Health Initiative (WHI) was a randomized primary-prevention
trial of estrogen plus progestin in 16,608 postmenopausal women who were
50-79 years of age at baseline. After a mean follow-up of 5.2 years, the
study was terminated prematurely (planned duration, 8.5 years) due to
an excessive risk in the treatment group. HRT was associated with a hazard
ratio for coronary artery disease of 1.24. The elevation in risk was most
apparent at one year.
In conclusion,
current evidence suggests that HRT should not be prescribed for primary
or secondary prevention of cardiovascular disease in post-menopausal women.
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| 2. |
Aspirin
is indicated for her as a preventive drug intervention. True or False
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False.
Aspirin therapy should only be used in high risk women with high risk
criteria being established coronary artery disease, cerebrovascular disease,
peripheral arterial disease, abdominal aortic aneurysm, end stage or chronic
renal disease, diabetes mellitus and 10-year Framingham risk >20%. Routine
use of aspirin for healthy women <65 years of age is not recommended to
prevent coronary artery disease.
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| 3. |
Vitamin
E supplement is useful for prevention of coronary artery disease in women.
True or False |
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False.
Antioxidant vitamin supplements (e.g. vitamin E, C and beta carotene)
should not be used for the primary or secondary prevention of cardiovascular
disease.
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| 4. |
Folic
acid supplement is useful for prevention of coronary artery disease in women.
True or False |
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False.
Folic acid, with or without B6 and B12 supplement, should not be used
for the primary or secondary prevention of cardiovascular disease.
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Dermatology
Series 皮膚科病例研究
A 65 year old female
presented with toe nail deformity for few years. There was pain due to pressure.
Physical examination revealed transverse over-curvature over all her toenails.
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The
content of the Dermatology Series is provided by:
Dr. CHAN Loi Yuen, Dr. TANG Yuk Ming, William, Dr. MAK Kam Har & Dr.
CHOW Ka Yuen
Specialists in Dermatology & Venereology
皮膚科病例研究之內容誠蒙陳來源醫生、鄧旭明醫生、麥錦霞醫生及周家源醫生提供。 |
Answers
| 1. |
What
is the diagnosis?
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The diagnosis
is pincer nail deformity. It is a common toenail disorder. Pincer nail
most commonly involves the big toenails but other toenails and finger
nails can also be affected. The condition is characterised by an increase
of transverse curvature of the nail plate along its longitudinal axis.
The curvature increases progressively from proximal to distal, producing
a "trumpet" appearance in severe cases. The deformed nail plate compresses
or impinges on the nail bed and underlying dermis, producing pain and
discomfort.
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| 2. |
What
is underlying cause?
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It is most
commonly caused by pressure from tight shoe. Other causes include onychomycosis,
subungual exostoses and congenital.
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| 3. |
What
investigation may be required?
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X ray may
be required to rule out subungual exostoses.
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| 4. |
What
are the treatments?
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If pain is
significant, surgical removal or reconstruction of the nail unit may
be required. Commercial plastic braces can also be considered.
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| 5. |
She
complained that her toenails do not grow as she doesn't need to trim.
How would you advise on her?
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Linear growth
rate of a nail should not be assessed by rate of trimming nail. Instead,
it can be assessed by observation of the distal movement of a reference
point on the nail plate, which can be marked by physical method. In general,
finger nails grow 1 cm every 3 months and toenails at half this rate.
Slower linear growth occurs in conditions such as old age, poor nutrition,
hypothyroidism, cold environment, immobility and yellow nail syndrome.
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