Finger - Pulse Volume during Co2 Induced Panic States
نویسندگان
چکیده
Changes in Fingure-Pulse Volume (FPV) during CO(2) inhalation were studied in patients diagnosed as having Anxiety disorder with history of panic attacks. Waxing and Waning of the FPV was observed in all the cases after CO(2) inhalation, and this pattern was significantly intensified during panic attacks during the study. The significance and the mechanism underlying the same is discussed.
منابع مشابه
Finger Pulse Volume in Patients with Panic Attacks
To study the peripheral blood flow in patients with panic attacks during "Stress" conditions, nine patients with history of panic attacks were subjected to mental stress of arithmetic calculation and room-air voluntary hyperventilation. Finger Pulse Volume (FPV) was significantly altered during the period following mental activity in untreated patients when compared to controls and patients und...
متن کاملDiminished finger volume pulse in borderline hypertension: evidence for early structural vascular abnormality.
Digital volume pulse maximum dilation was determined in 27 patients with borderline essential hypertension (BHT) and 28 age-matched normotensive controls (NT). Finger pulse volume (PV) and finger systolic pressure (SBP) were measured by pneumoplethysmography during vasodilation induced by combining direct and reflex heat dilation and reactive hyperemia. Finger SBP was higher (p less than 0.01) ...
متن کاملChanges in neuroactive steroid secretion associated with CO2-induced panic attacks in normal individuals.
Neuroactive steroids modulate anxiety in experimental animals and possibly in humans. The secretion of these compounds has been found to be altered in panic disorder (PD), with such alterations having been suggested to be a possible cause or effect of panic symptomatology. Panic-like attacks can be induced in healthy individuals by administration of panicogenic agents or by physical procedures,...
متن کاملCarbon dioxide test as an additional clinical measure of treatment response in panic disorder.
OBJECTIVE We aim to determine if a treatment with a dose of clonazepam--2 mg/day, for 6 weeks, blocks spontaneous panic attacks and the ones induced by the inhalation of 35% carbon dioxide (CO2) in panic disorder (PD) patients. The CO2 challenge-test may be a useful addition tool for measuring the pharmacological response during the initial phase (6 weeks) in the treatment of PD. METHOD Eight...
متن کاملProspective evaluation of panic potentiation following 35% CO2 challenge in nonclinical subjects.
OBJECTIVE The authors examined the effect of panic provocation on the subsequent development of panic attacks and panic disorder in nonclinical subjects with no history of spontaneous panic. METHOD Sixty-two subjects who had completed a study examining fearful responses to a single vital capacity inhalation of 35% CO2 were reevaluated 1 year following the challenge test. RESULTS Challenge-i...
متن کامل