"This device is very, very effective." -- Westford paramedic Al Gentile Gentile was talking about LUCAS, a $15,000 automatic CPR machine that he said is far more effective than manual CPR. The device, which Westford rescue officials recently obtained, wraps around a victim's chest and automatically pumps their heart for over an hour. Gentile said the survival rate for with the machine is 35 percent, compared to 10 percent with manual CPR. LUCAS stands for Lund University Cardiac Arrest System.