234. Hyperventilation load in Vasospatic angina : Effects lung activity

Effects of Hyperventilation Can hyperventilation cause syncope?

Effect of hyperventilation on electroencephalographic activity.

OBJECTIVE To observe the effect of voluntary hyperventilation on electroencephalographic activity during routine EEG recording on patients referred to a tertiary care hospital. METHODS This was an observational study conducted at Neurophysiology Lab, Department of Neurology at Liaquat National Hospital, Karachi from May 2007 to September 2007. Data of 326 patients was collected prospectively ...

Electroencephalographic activity during voluntarily controlled alveolar hyperventilation.

The following results were obtained from a series of investigations in which alveolar hyperventilation was controlled within narrow limits. (1) Delta rhythm was not directly related to alveolar ventilation, alveolar carbon dioxide tension or excretion of carbon dioxide. The appearance of d:lta rhythm was not necessarily associated with loss of consciousness. (2) Frontal alpha rhythm was apparen...

Phase changes caused by hyperventilation stress in spastic angina pectoris analyzed by first-pass radionuclide ventriculography.

To understand the effect of hyperventilation (HV) stress in patients with spastic angina, left ventricular (LV) contraction was analyzed by quantitative phase analysis. The study was performed on 36 patients with spastic angina pectoris, including vasospastic angina pectoris (VspAP: 16 patients) and variant angina pectoris (VAP: 20 patients). First-pass radionuclide ventriculography (first-pass...

Effect of magnesium on anginal attack induced by hyperventilation in patients with variant angina.

To examine whether or not magnesium suppresses coronary spasm, the effect of magnesium infusion on anginal attacks induced by hyperventilation was studied in 20 patients with variant angina. In all patients, anginal attacks associated with ischemic ST segment changes on the electrocardiogram were repeatedly induced by hyperventilation. The study was performed in the early morning successively f...