Confidence votes 11. According to Wikipedia, the width of the Atlantic Ocean at its narrowest point is 2,848 kilometers (1,770 mi) between Brazil and Sierra Leone.
Paroxysmal nocturnal hemoglobinuria (PNH) may cause unpredictable episodes of acute red blood cell destruction (hemolysis). This occurs when a part of your immune system called complement attacks red blood cells that lack certain protective proteins.
Cause. 1  Thrombosis of the superior vena cava caused by an indwelling central venous catheter which caused superior vena cava syndrome. 2  A CXR of a person with lung cancer which was causing superior vena cava syndrome. 3  A CT image showing compression of the right hilar structures by cancer.