Exhibit 3


                             JOINT FILING AGREEMENT


In accordance with Rule 13-d(k)(1) promulgated under the Securities Exchange Act
of 1934, the undersigned agree to the joint filing of a Statement on Schedule
13D (including any and all amendments thereto) with respect to the Common Stock
of Visicu, Inc., and further agree to the filing of this agreement as an Exhibit
thereto. In addition, each party to this Agreement expressly authorizes each
other party to this Agreement to file on its behalf any and all amendments to
such Statement on Schedule 13D.

Dated: December 28, 2007


                                    KONINKLIJKE PHILIPS ELECTRONICS N.V.


                                    By:    /s/ Michael L. Manning
                                        ----------------------------------------
                                        Name:   Michael L. Manning
                                        Title:  Attorney-in-Fact


                                    PHILIPS HOLDING USA INC.


                                    By:    /s/ Michael L. Manning
                                        ----------------------------------------
                                        Name:   Michael L. Manning
                                        Title:  Attorney-in-Fact