Booklet Question 122

A 67 year old male presents with a three month history of shortness of breath on exertion. He complains of shortness of breath on lying flat at night. There is no recent history of chest pain. He had an MI twenty years ago. On examination he is haemodynamically stable but you notice a raised JVP alongside some mild ankle oedema. Which next step would be most appropriate in Primary Care according to NICE CKS?