Signs and symptoms
Symptoms:

Paroxysmal—appears suddenly, and in episodes of short duration: lasts only seconds to minutes
Positional—is induced by a change in position, even slight
Vertigo—a spinning dizziness, which must have a rotational component
Torsional nystagmus—a diagnostic symptom where the top of the eye rotates toward the affected ear in a beating or twitching fashion, which has a latency and can be fatigued (vertigo should lessen with deliberate repetition of the provoking maneuver): nystagmus should only last for 30 seconds to one minute
Pre-syncope—(feeling faint) or syncope (fainting) is unusual, but possible
Visual disturbance—due to associated nystagmus, making it difficult to read or see during an attack
Nausea—is often associated
Vomiting—is common, depending on the strength of vertigo itself and the causes for this illnessMany people will report a history of vertigo as a result of fast head movements. Many are also capable of describing the exact head movements that provoke their vertigo. Purely horizontal nystagmus and symptoms of vertigo lasting more than one minute can also indicate BPPV occurring in the horizontal semicircular canal. The spinning sensation experienced from BPPV is usually triggered by movement of the head, will have a sudden onset, and can last anywhere from a few seconds to several minutes. The most common movements people report triggering a spinning sensation are tilting their heads upward in order to look at something and when rolling over in bed.People with BPPV do not experience other neurological deficits such as numbness or weakness. If those symptoms are present, a more serious etiology, such as posterior circulation stroke or ischemia, must be considered.
Gastric atresia is a congenital defect with complete occlusion of the pyloric outlet of the stomach. Cause
Gastric atresia is a birth defect. It can be genetic, inherited in an autosomal recessive manner, and associated with conditions like Down syndrome and junctional epidermolysis bullosa (medicine). In about 60% of cases, the outlet of the stomach is covered by a membrane. In around 35% of cases, solid tissue blocks the outlet. In the remaining cases (less than 10%), there is a complete separation of the stomach and the small intestine. Diagnosis
Polyhydramnios is often seen during pregnancy, and prenatal diagnosis is common. Infants with gastric atresia will exhibit forceful vomiting upon the first feeding. Imaging is required for diagnosis. Treatment
Treatment is surgical and involves removing or bypassing the obstruction. Epidemiology
It is seen in approximately 1 in 100,000 live births. == References ==