Scary movies may trigger arrhythmias

Mental stress experienced during a movie or TV sports event could have an arrhythmogenic effect via ventricular repolarisation, UK cardiologists have shown.

Researchers at The Heart Hospital, University College London, monitored ECG and other haemodynamic and respiratory changes in 19 healthy volunteers who watched an emotionally charged film clip from The Vertical Limit.

As expected, they observed that viewers of the stressful clip showed an increase in BP and breathing rate. These changes