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The Valsalva maneuver may help check for a dural tear following certain spinal operations, such as a microdiscectomy. An increase in intra-spinal pressure will cause cerebral spinal fluid (CSF) to leak out of the dura, causing a headache. [citation needed] The Valsalva maneuver has been associated with transient global amnesia. [17] [18] [19 ...
An early investigation showed that the brief intrathoracic pressure increase during a Valsalva maneuver resulted in an associated rise in ICP. [21] Two other investigations using transcranial Doppler ultrasound techniques showed that resistive exercise without a Valsalva maneuver resulted in no change in peak systolic pressure or ICP.
Cold water ingress through a perforated eardrum can cause caloric vertigo, usually a short term effect. [2] Ingress of contaminated water through a perforated eardrum can cause infections of the middle ear. [2] Over-vigorous attempts to equalise using the Valsalva maneuver can lead to inner ear barotrauma [2]
A vagal maneuver is an action used to stimulate the parasympathetic nervous system by activating the vagus nerve. The vagus nerve is the longest nerve of the autonomic nervous system and helps regulate many critical aspects of human physiology, including heart rate, blood pressure, sweating, and digestion through the release of acetylcholine .
Other possible causes of vertigo in divers: Inner ear barotrauma can lead to varying degrees of conductive and sensorineural hearing loss as well as vertigo. It is also common for conditions affecting the inner ear to result in auditory hypersensitivity. [19] Two possible mechanisms are associated with forced Valsalva manoeuvre.
Benign paroxysmal positional vertigo (BPPV) is the most common cause of peripheral vertigo. [2] It can be characterized by three main symptoms: positional onset, spinning dizziness and short-lived symptoms. The primary diagnostic maneuver is the Dix-Hallpike which elicits the cardinal sign associated with BPPV, rotatory nystagmus.
Idiopathic or unknown cause (idiopathic intracranial hypertension, a common cause in otherwise well people especially younger women) [citation needed] Craniosynostosis; One of the most damaging aspects of brain trauma and other conditions, directly correlated with poor outcome, is an elevated intracranial pressure. [10]
Both Valsalva maneuver and standing decrease venous return to the heart thereby decreasing left ventricular diastolic filling and causing more laxity on the chordae tendineae. This allows the mitral valve to prolapse earlier in systole , leading to an earlier systolic click (i.e. closer to S 1 ), and a longer murmur.
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