Return of autonomic nervous activity after delivery: role of aortocaval compression

Return of autonomic nervous activity after delivery: role of aortocaval compression.

We have compared measures of heart rate variability (HRV) in 15 women in late pregnancy before and 3 months after delivery and in 20 non-pregnant controls, to study the effect of aortocaval compression on autonomic nervous activity. Normalized high-frequency power was used as an index of vagal activity and the low-/high-frequency power ratio as index of sympathovagal balance. We found that the ...

Severely impaired cardiac autonomic nervous activity after the Fontan operation.

BACKGROUND Elevated neurohumoral activity and an abnormal cardiopulmonary response to exercise are well-established characteristics in patients after the Fontan operation. However, there have been few studies addressing cardiac autonomic nervous activity (CANA) in these patients. METHODS AND RESULTS We evaluated CANA in 63 post-Fontan patients and 44 controls. Cardiac parasympathetic nervous ...

Measuring autonomic nervous system activity

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Aortocaval compression secondary to an ovarian cyst.

Ranitidine 150 mg was given orally as routine antacid treatment. Vascular preloading was with 1.0 litres of Hartmann's solution, and throughout this process the patient received 4007 oxygen in air via a face mask. The epidural space was cannulated at L2 -3 and correct placement of the catheter was confirmed with 3 ml of 0.5% bupivacaine plain. A further 10 ml was injected with the patient sitti...