The assumption that all doctors are well informed about the latest arguments regarding the pros and cons of unilateral or bilateral electroconvulsive therapy (ECT) may not be right. We would like to take this opportunity to update readers of current developments that may potentially revolutionise or even significantly modify our thinking about this controversial treatment.

As the author says, the UK ECT review group in 2003 had an important shortcoming of inclusion of all stimulus intensities, leading to a dubious conclusion in favour of the advantages of bilateral ECT. ¹ Although we do believe that the uncertainty in evidence exists, the emerging evidence base, particularly in the USA and Australia, may tilt the balance of opinion and attitudes, more in favour of right unilateral (RUL) ECT with the ultra-brief type of pulse width.

Sackeim et al ^{Reference Sackeim, Prudic, Nobler, Fitzsimmons, Lisanby and Payne2} and Loo et al ^{Reference Loo, Sainsbury, Sheehan and Lyndon3} have in 2008 published research indicating that ultra-brief pulse width right unilateral ECT is likely as effective as the conventional one (brief pulse RUL), in addition to being significantly better in terms of cognitive disability. This is an exciting new development as we believe cognitive disability has consistently been underplayed in studies on ECT over the years. Robertson & Pryor ^{Reference Robertson and Pryor4} as well as Mangaoang & Lucey ^{Reference Mangaoang and Lucey5} cite extensive relevant body of research suggesting a lot more cognitive damage and disability, undetected by conventional testing. Additionally, if the patients were to be made aware of a potential modality of treatment with significantly less cognitive disability, they may actually make a more completely informed decision.

Although it is not difficult to adapt current practice to using ultra-brief pulse width RUL ECT by slight modification of the ‘programmes’ settings available on current machines in the UK, this detail is clearly beyond the scope of this letter.

In conclusion, we posit that the need for faster recovery by using bilateral ECT may be more than balanced by the need to deliver the treatment that is less disabling (in terms of cognitive disability) and possibly equally effective.