Obstruction n. : The act of obstructing, or state of being obstructed.

Obstruction n. : That which obstructs or impedes; an obstacle; an impediment; a hindrance.

Obstruction n. : The condition of having the natural powers obstructed in their usual course; the arrest of the vital functions; death.

Example:
From what percentage of Obstruction a heart surgery is recomended?

Taxonomy
Obstruction, free encyclopedia, search, Sports, free dictionary, mathematics, crime, law enforcement, respiratory problem, blockage, intestines, fielder, baserunner, disambiguation pages, Personal tools, Interaction, Toolbox, Languages.

Defination from the web:
Obstructions, a 2003 film. Obstruction Island (Washington) Emergency Workers (Obstruction) Act 2006 ... Retrieved from "http://en.wikipedia.org/wiki/Obstruction" Categories: Disambiguation pages ...