<prompt> Which of the following represents the clinical presentation of a patient with critical lower limb ischemia?Intermittent ClaudicationIntermittent Claudication and gangreneRest pain and ischemic ulcersIntermittent claudication and ischemic ulcers  <response>: Patient with critical limb ischemia has insufficient perfusion to sustain limb at rest, if left untreated such patients require amputation in 6 months. They experience pain at rest, ulcers and ischemic gangrene. Rest pain is exacerbated when lying supine and is improved by dangling the feet. Narcotics can also relieve the pain. Ref: Noninvasive Cardiovascular Imaging: A Multimodality Approach By Mario J. Garcia, Page 123; Schwazs Principles of Surgery, 9th Edition, Chapter 23 