Chapter 4:

Seizure Thresholds in Elderly Patients Treated with Electroconvulsive Therapy for Major Depressive Disorder: A Review

Jeroen A. van Waarde and Rose C. van der Mast

Current Psychiatry Reviews, Volume 6, Issue 3, Pages 184-190 (7) 

http://dx.doi.org/10.2174/157340010791792644