Use of breath holding for evaluating cerebrovascular reserve capacity.

Clinical Use of Electrocardiography (ECG) in Children with Breath-Holding Spells

Background and objective: Breath holding spell (BHS) is one of the most common benign non-epileptic paroxysmal attacks in children triggered by a provocative action such as emotional distress and partial damage, and continues with breath-holding, cyanosis and syncope. This study aimed to compare the electrocardiographic components and the demographic data of children with BHS and healthy childr...

Effective breath holding time in the measurement of the pulmonary diffusing capacity by single breath method.

prolonged, this treatment leads to a considerable error in the DL value. In order to eliminate this error a correction factor of the inspiration time was newly introduced to obtain the effective inspiration time. The correction factor was a function of the ratio of the residual capacity to the total alveolar gas volume and the ratio of DL to the flow rate of inspiration. A nomogram was made for...

Estimation of cerebrovascular reactivity using transcranial Doppler, including the use of breath-holding as the vasodilatory stimulus.

BACKGROUND AND PURPOSE A proportion of individuals with carotid artery stenosis show a reduced cerebrovascular reserve as measured by a reduced cerebral arterial vasodilatory response to carbon dioxide. Two methods of quantifying this vasodilatory response, using transcranial Doppler ultrasonography, have been in general use: the total range of vasodilation between hypocapnia, induced by hyperv...

The limits of breath holding.

Effect of breath holding on cerebrovascular hemodynamics in normal pregnancy and preeclampsia.

Preeclampsia (PE) is associated with endothelial dysfunction and impaired autonomic function, which is hypothesized to cause cerebral hemodynamic abnormalities. Our aim was to test this hypothesis by estimating the difference in the cerebrovascular response to breath holding (BH; known to cause sympathetic stimulation) between women with preeclampsia and a group of normotensive controls. In a p...