In a recent large study carried out by the Consortium for Research in ECT (CORE), Husain and colleagues3 reported that 34% of 253 patients achieved remission (HAM-D score of 10) at or before the 6th session with ECT (within 2 weeks) and 65% achieved remission at or before the 10th session (within 3 to 4 weeks)। More than half (54%) had an initial first response (decrease of 50% in HAM-D score) by session 3. Furthermore, 19% of the seriously ill cohort in this study (baseline HAM-D score of approximately 35) experienced remission with 4 or fewer ECT sessions."