Antipsychotic medication use may be associated with prolongation of the QTc interval, increasing the risk of potentially fatal arrhythmias [1]. This is particularly pertinent in the elderly due to comorbid cardiovascular disease and polypharmacy. Attention to the ECG and co-prescribed medications is essential to minimise cardiac risk when prescribing antipsychotics.

On 23rd February 2016 all inpatients aged over 65 who were prescribed antipsychotic medications were identified as part of a hospital-wide survey. Data was collected from medical and electronic patient notes and medication kardexes.

Complete data was obtained for 36 patients aged over 65 who were newly-prescribed an antipsychotic or had their antipsychotic changed. Of these, 39%(n = 13) had a cardiac history. One quarter did not have an ECG in the 12 months preceding antipsychotic initiation. Of the 28 patients with an ECG, 57% (n = 16) had a QTc > 450ms before starting antipsychotic treatment. Only 11% (n = 4) had an ECG within 24 hours of starting the antipsychotic. The average change of the QTc interval in those with a repeat ECG was 30msecs. 42% (n = 15) were co-prescribed another QTc-prolonging medication.

Current monitoring of QTc interval in an elderly population newly prescribed antipsychotic medications is inadequate and a cause for significant safety concerns. Education and clear guidance is warranted to improve safety and minimise risk in this population.

The authors have not supplied their declaration of competing interest.