An electrophysiological study (EPS) is an invasive test performed to gather information on an abnormal heart rhythm (arrhythmia), usually a supraventricular tachycardia (SVT), to diagnose and treat arrhythmias.

An echocardiogram (also known as a transthoracic echo, or TTE) is an ultrasound scan of the heart and nearby blood vessels to assess their structure and function. Self-pay price: £700.