Phil Jackson is in the hospital, his assistants are on alert.

Less than 24 hours after victory in Game 3, no one knows who will coach the Lakers today in Game 4.

Jackson?

Or assistant coach Jim Cleamons?

It all depends on test results from an angioplasty procedure performed Saturday morning on Jackson.

It depends on Jackson's heart.

Can it withstand the stress of a critical postseason game?

Can it hold up under the pressure of another nerve-racking, playoff run?