ABSTRACT
Background: Hyperthyroidism is associated with altered cardiac autonomic nervous activity (CANA). Heart Rate Variability (HRV) analysis is a promising technique to quantify CANA and therefore can be done in hyperthyroidism. Objective: To observe the HRV parameters in patients with hyperthyroidism to find out the influence of excess thyroid hormone on cardiac autonomic nervous activities. Method: The cross sectional study was carried out on 60 hyperthyroid patients (groupB)aged 30-50 years in the Department of Physiology, BSMMU, Dhaka from 1st July 2007 to 30th June 2008. Age and sex matched 20 apparently healthy euthyroids were also studied for comparison (group A). On the basis of treatment, they were further divided into group B1 consisting of 30 untreated newly diagnosed patients and group B2 consisting of 30 hyperthyroid patients treated with antithyroid drugs for at least 2 months. The patients were selected from the Out Patient Department of Endocrinology, BSMMU, Dhaka. To assess thyroid status, serum TSH and serum FT4 levels were measured by AxSym system and time domain measures of HRV such as mean R-R interval, mean heart rate, SDNN and RMSSD were assessed from 5minute(short term) ECG recording by a polygraph. For statistical analysis Mann-Whitney U test was done. Results: Mean R-R interval was significantly (P<0.001) lower but mean heart rate was significantly (P<0.001) higher in untreated patients than those of treated and euthyroids subjects. These values were found almost similar when compared between euthyroids and treated hyperthyroids. Similarly SDNN and RMSSD were significantly lower in untreated hyperthyroids than both euthyroids (P<0.001) and treated hyperthyroids (P<0.01). Conclusion: This study concluded that decreased vagal modulation on heart rate may occur in hyperthyroidism, which may be restored following adequate treatment of the disease.
ABSTRACT
This was a quasi-experimental interventional study to see the role of injection magnesium sulphate in eclampsia and severe pre-eclampsia patients at community level in a rural set up before referral to the hospital. This study was conducted on 265 cases of eclampsia and severe pre-eclampsia over a period of six months from July 2001 to December 2001. Among 265 cases, 133 were in intervention group who had received loading dose of injection magnesium sulphate before referral and the rest 132 were in non-intervention group, had not received injection magnesium sulphate before admision in hospital. The number (mean +/- SD) of convulsion before treatment in intervention and non-intervention groups were 4.7 +/- 2.64 & 6.86 +/- 2.97 respectively. Recurrence of fits observed more in non-intervention group and the difference was statistically significant (p<.001). Mean (+/- SD) time taken to regain full consciousness was 12.0+9.6 and 17.4+7.4 hours in the intervention and non-intervention group respectively (p<.05). Control of convulsion by loading dose of 10 gm of injection magnesium sulphate was achieved in 94.0% of the intervention group and 74.0% in non-intervention group. There was only 3(2.3%) maternal death in study group whereas in non-intervention group maternal death was 14(10.4%) and the difference was highly significant (p<.005). Fourteen (13.7%) babies were still born in intervention group and 21(20%) in non-intervention group. The difference was statistically highly significant (p<.001). Remarkable achievements were obtained through use of magnesium sulphate at the community level at rural setting among the eclampsia and severe pre-eclampsia cases.