The medical examiner says a woman who died unnoticed on a Brooklyn hospital floor was killed by blood clots caused by a long period of physical inactivity.

Esmin Green had been sitting in a waiting room at the Kings County Hospital Center for nearly 24 hours when she collapsed from her chair and slowly died on June 19.

She lay on the floor for an hour before a nurse finally checked her pulse.

The medical examiner says the 49-year-old died of pulmonary thromboemboli — blood clots that form in the legs and travel through the bloodstream to the lungs.

The clots were due to deep vein thrombosis, caused by physical inactivity. It complicated an underlying psychological illness: chronic paranoid schizophrenia.

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