<prompt> All are true about Left ventricular failure exceptPulmonary oligemiaKerley B linesRedistribution to apicesCardiomegaly  <response>: In chest radiography, the Westermark sign is a sign that represents a focus of oligemia hypovolemia leading to collapse of vessel seen distal to a pulmonary embolism PE.In chest radiography, the Westermark sign is a sign that represents a focus of oligemia hypovolemia leading to collapse of vessel seen distal to a pulmonary embolism PE. Ref ganongs review of medical physiology 25e p418 