Effects of cardiac valve replacement on the left ventricular volume and cardiac systolic function of the patient with giant left ventricle / 医学研究生学报

Objective Giant left ventricle indicates severe or irreversible pathologic injury of the cadiocytes in the left ventricle.This study was to investigate the effects of cardiac valve replacement on the volume of the left ventricle and systolic function of the heart.Methods We retrospectively analyzed the clinical data about 41 cases of cardiac valve replacement for giant left ventricle (left ventricle end diastolic dimension LVEDD ≥ 70 mm and left ventricle end systolic dimension LVESD ≥ 50 mm).We compared the LVEDD,LVESD and left ventricular ejection fraction (LVEF) of the patients before and at 1 week,3 months and 1 year after operation.Results Compared with the baseline,LVEDD and LVESD were decreased significantly at 1 week,3 months and 1 year after operation in a timedependent manner (P＜0.01),while LVEF reduced at 1 week (P＜0.01),restored to the preoperative level at 3 months (P=0.10),and increased at 1 year postoperatively (P＜0.05).Based on the New York Heart Association (NYHA) functional classification,there were 16 cases of class Ⅱ,22 cases of class Ⅲ,1 case of class Ⅲ-Ⅳ,and 2 cases of class Ⅳ preoperatively.Follow-up was completed in 36 cases (87.8％),with a mean time of 50.03± 19.28 (12-95) months,during which 34 (94.4％) of the patients survived,including 24 cases of NYHA class Ⅰ and 10 cases of class Ⅱ,and 2 (5.6％) died,1 from chronic cardiac failure complicated by multiple organ failure and the other from liver cancer with systemic metastasis.Five (12.2％) of the cases were lost to follow up.Conclusion Cardiac valve replacement decreases the left ventricular volume of the patient with giant left ventricle in a time-dependent manner.The systolic function of the heart is reduced in the early postoperative period,which,however,may gradually improve with time and become better than the preoperative status.

The analysis of plasma homocysteine among 1020 residents in community / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the plasma homocysteine (Hcy) distributive characteristics in different sex and age groups of the community residents in Guangdong, and to analyze its associated factors as well as its effects on cerebral artery stenosis.</p><p><b>METHODS</b>In this study, we presented data concerning 2500 residents who had undergone a systematic health checkup,including clinical and biologic examinations. Plasma was saved from 1020 residents who were asymptomatic but having TCD examination. Hcy concentration was measured by fluorescence ration biochemical assay kit.</p><p><b>RESULTS</b>The average plasma Hcy levels of males (15.0 micromol/L+/-5.8 micromol/L) were significantly higher than those of females (12.4 micromol/L-I 3.9 micromol/L, P< 0.05). Hcy level increased parallel with age. The prevalence rate of hyperhomocysteinemia in males (47.2%) was higher than in females (23.2%). Hcy levels in MCA stenosis group (18.3 micromol/L+ 5.3 micromol/L) were significantly higher than that in control group (12.9 micromol/L+/- 4.6 micromol/L, P< 0.05). Based on logistic regression analysis, Hcy was only associated with sex and age, but not with blood lipids etc.</p><p><b>CONCLUSION</b>Hcy levels were different in sex and age groups which emerged as independent predictors of hyperhomocysteinemia but had no association with blood lipids in the community residents, suggesting that hyperhomocysteinemia might worsen cerebral artery stenosis.</p>

Analysis on data gathered from transcranial Doppler among 1500 normal adults community / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the rates of receiving doppler signal, flow velocity of cerebral artery and the relationship between flow velocity,age and gender in normal adults in China.</p><p><b>METHODS</b>A total of 1500 normal residents at the community level in Guangdong province were examined, using transcranial doppler. Data was gathered and analyzed.</p><p><b>RESULTS</b>With the increase of age, the rate of receiving signal in cerebral artery gradually decreased. Difference between males and females was noticed. Mean velocity of cerebral artery decreased in both genders but the velocity was faster in females than in males and the pulsate index increased without difference.</p><p><b>CONCLUSION</b>The rates of receiving signal and the flow velocity of cerebral artery were related to age and gender and the findings from this study offered criterion for clinical transcranial doppler.</p>