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What is a pulmonary embolism and what are the symptoms to look out for?

Catherine O'Hara's most iconic Schitt's Creek moments as beloved Moira Rose
  • A pulmonary embolism is a serious condition in which a blood clot blocks an artery in the lung, often originating from a deep leg vein, according to the Mayo Clinic.
  • Symptoms of a pulmonary embolism can include sudden shortness of breath, chest pain, and fainting, and it can be life-threatening if not treated promptly.
  • Other symptoms can include rapid or irregular heartbeat, swelling of the legs and clammy or discolored skin, called cyanosis.
  • Actress Catherine O'Hara, known for her roles in Home Alone and Schitt's Creek, died at the age of 71 last month. Her official cause of death has been confirmed as a pulmonary embolism.
  • Rectal cancer was listed as the underlying cause contributing to her death.
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