23rd September 2021

A 15-year-old male presents to his GP with exertional dyspnoea

A 15-year-old male presents to his GP with exertional dyspnoea, which had been ongoing over the last few months and had stopped him from playing sport. However, he reports no chest pain or syncope. He has no past medical or family history. The most significant findings on examination are a systolic murmur that radiates to his back and fixed splitting of the second heart sound. The GP refers him to secondary care for investigation.

Which of the following is the most appropriate first-line investigation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.