#spasm  (pathology) sudden constriction of a hollow organ (as a blood vessel)
  supertype:  constriction  the action or process of constricting or squeezing
  subtype:  bronchospasm  a spasm of the bronchi that makes exhalation difficult and noisy; associated with asthma and bronchitis
  subtype:  cardiospasm  a spasm of the cardiac sphincter (between the esophagus and the stomach); if the cardiac sphincter does not relax during swallowing the passage of food into the stomach is obstructed
  subtype:  retch__heave  an involuntary spasm of ineffectual vomiting; "a bad case of the heaves"
  subtype:  laryngismus__laryngismu  laryngeal spasm caused by the sudden contraction of laryngeal muscles

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