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PageNet. PageNet, also known as Paging Network, Inc., was founded in 1981 by entrepreneur George Perrin and ceased in 1999. The company grew to become the largest wireless messaging company in the world, with more than 10 million pagers in service, and $1 billion in revenues, before the paging industry's rapid decline in the late 1990s.
Levine's sign is a clenched fist held over the chest to describe ischemic chest pain. [ 1 ] It is named for Samuel A. Levine (1891–1966), an influential American cardiologist, who first observed that many patients with chest pain made this same sign to describe their symptoms. This clenched fist signal may be seen in patients with acute ...
The most common symptom is sudden pain in one side of the lung and shortness of breath. A pneumothorax also can put pressure on the lung and cause it to collapse. If the pneumothorax is small, it may go away on its own. If large, a chest tube is placed through the skin and chest wall into the pleural space to remove the air.
Symptoms include chest pain or pain that comes and goes, radiating to the jaw and either arm, fatigue, heart palpitations (myocarditis can cause heart arrhythmias), lightheadedness, shortness of ...
Axial lower chest CT scan showing bowel herniation due to left diaphragmatic rupture. A CT scan has an increased accuracy of diagnosis over X-ray, [7] but no specific findings on a CT scan exist to establish a diagnosis. [9] The free edge of a ruptured diaphragm may curl and become perpendicular to the chest wall, a sign known as a dangling ...
Especially when accompanied by shortness of breath, these symptoms can indicate cardiac amyloidosis, Zoghbi says. “It’s a problem of protein misfolding,” he explains. “The protein, which ...
(A collapsed lung can also cause chest pain that worsens when you breathe or cough, and shortness of breath.) These symptoms suggest a medical emergency that warrants a 911 call. Chest pain that ...
Air fills the space between the collapsed left lung and the chest wall. Catamenial pneumothorax is a spontaneous pneumothorax that recurs during menstruation, within 72 hours before or after the onset of a cycle. [1] It usually involves the right side of the chest and right lung, and is associated with thoracic endometriosis. [2]