Category Differential diagnosis
CCC Critical Care Compendium 680

Post-cardiac arrest syndrome

Post-cardiac arrest syndrome (aka post-resuscitation syndrome). Occurs after return of spontaneous circulation (ROSC) following cardiorespiratory arrest and involves multiple systems Reflects a state of whole-body ischaemia and subsequent reperfusion
CCC Critical Care Compendium 680

Pulsus Paradoxus

Pulsus paradoxus is defined as an inspiratory drop in blood pressure of 10mmHg or more during normal breathing.
CCC Critical Care Compendium 680

Murmurs DDx

Heart murmurs are abnormal heart sounds believed to be caused by turbulent flow across heart valves or vascular abnormalities. When assessing a murmur, determine 6 characteristics: position at which it is loudest, grade, timing, duration, presence of a thrill, radiation and changes during respiration or with dynamic manoeuvers
CCC Critical Care compendium 340


Pancreatitis is inflammation of the pancreas and involves activation of proteolytic enzymes that may progress to haemorrhagic necrosis of the pancreatic parenchyma
CCC Critical Care Compendium 680


Hyperammonemia: High levels of ammonia in the blood (typical reference range, 11-35 umol/L). This is rare, except in the presence of liver failure.
CCC Critical Care Compendium 680

Hilar enlargement on chest x-ray

Hilar enlargement reflects one of 4 types of processes: Lymphadenopathy and tumors; Pulmonary venous hypertension; Pulmonary arterial hypertension; or Increased pulmonary blood flow
CCC Critical Care Compendium 680

Upper Gastrointestinal Haemorrhage DDx

Upper gastrointestinal haemorrhage is classically bleeding from above the ligament of Trietz (the suspensory muscle of duodenum that connects to the diaphragm), can is characterised by haemetemesis and melaena.