Hyperventilation of pregnancy.

Physiological mechanisms of hyperventilation during human pregnancy.

This study examined the role of pregnancy-induced changes in wakefulness (or non-chemoreflex) and central chemoreflex drives to breathe, acid-base balance and female sex hormones in the hyperventilation of human pregnancy. Thirty-five healthy women were studied in the third trimester (TM(3); 36.3+/-1.0 weeks gestation; mean+/-S.D.) and again 20.2+/-7.8 weeks post-partum (PP). An iso-oxic hypero...

Effects of Hyperventilation Can hyperventilation cause syncope?

Hyperventilation Syndrome

MOST PHYSICIANS are quite familiar with the isolated attack of acute hyperventilation that is characterized by dramatic overbreathingand classically culminates in tetany. Although terrifying to the patient, and almost equally alarming to any onlooker, these attacks are usually brief and without serious medical sequelae. Recently we have come to recognize a chronic hyperventilation pattern that ...

Hyperventilation of pregnancy presenting with flaccid quadriparesis due to hypokalaemia secondary to respiratory alkalosis.

Hyperventilation in pregnancy is a cause of chronic respiratory alkalosis. Alkalosis either metabolic or respiratory may cause intracellular shift of potassium ions that may lead to hypokalaemia. However, the resultant hypokalaemia in respiratory alkalosis is usually mild and does not cause much clinical features. A five-months-pregnant female of the age 25 years presented with sudden onset fla...

Hyperventilation in postural hypotension.