The purpose of this study is to determine whether treatment for depression with cognitive behavior therapy (CBT) is effective in reducing hemodynamic cardiovascular risk factors. Hemodynamic assessments including heart rate, heart rate variability, continues blood pressure, blood pressure variability, baroreceptor sensitivity and peripheral vascular resistance will be conducted at baseline, after treatment and 2-month follow up. In addition, circadian hemodynamic variations such as 24-hour heart rate variability, nocturnal blood pressure dipping and immunological biomarkers will be assessed. One-hundred patients with Major Depression will be randomly assigned to either a CBT treatment condition (14 hour-long, weekly sessions) or a waitlist condition, to control for potential changes in hemodynamic parameters without any intervention and the impact of repeated-measurement.