Participants in this study will be randomly assigned to 15 treatments of either rTMS or sham rTMS for 3 weeks. Following treatment, participants will receive citalopram for 9 weeks. Response rates to treatment; relapse rates; the size, number, and location of the vascular lesions; and the amount of regional brain atrophy will be measured. Improvements in activities of daily living, quality of life, and cognitive function will also be also measured.