A hospital spokesman says Poland's last communist leader, Gen. Wojciech Jaruzelski, has undergone a procedure to stabilize his heart beat.

Warsaw military hospital spokesman Wojciech Lubinski says the procedure Monday was successful and Jaruzelski's "heart is beating regularly now." He may be released on Tuesday.

Jaruzelski was admitted to hospital last week to undergo cardioversion, which involves delivering an electrical shock to the heart.

The 84-year-old former leader is a divisive figure in Poland because of his 1981 decision to impose martial law to crack down on the fledgling Solidarity movement.