Action movie where if your heart rate drops you die

One night per year, the government sanctions a 12-hour period in which citizens can commit any crime they wish -- including murder -- without fear of punishment or imprisonment. Leo, a sergeant who lost his son, plans a vigilante mission of revenge during the mayhem. However, instead of a death-dealing avenger, he becomes the unexpected protector of four innocent strangers who desperately need his help if they are to survive the night.

Two years after choosing not to kill the man who killed his son, former police sergeant Leo Barnes has become head of security for Senator Charlene Roan, the front runner in the next Presidential election due to her vow to eliminate the Purge. On the night of what should be the final Purge, a betrayal from within the government forces Barnes and Roan out onto the street where they must fight to survive the night.

Every minute of every year an American drops dead of a heart attack, hundreds of thousands without any warning or prior symptom. But these people could have been saved. The Widowmaker uncovers a chilling tale of greed, ego, and a conspiracy of silence around that most vulnerable of human organs - the heart.

An unlikely duo, Lieutenant Tom Royko of the Seattle Bomb Squad and renowned heart surgeon, Dr. Gillian Hayes, find themselves in a race against time to track down a disturbed bomber who is inexplicably causing Dr. Hayes' patients to explode.

Hong Kong action film from 1998

"HEART-STOPPING TRAIN" discusses what exists between life and death, between space and time. It is a narrative that twists the viewer beyond, exploring the pain and sadness of human existence.

Hong Kong movie

Chev Chelios, a hit man wanting to go straight, lets his latest target slip away. Then he awakes the next morning to a phone call that informs him he has been poisoned and has only an hour to live unless he keeps adrenaline coursing through his body while he searches for an antidote.