Case scenario 1
A 72-year-old man presents to the office complaining of several weeks of worsening exertional dyspnea. Previously,he had been able to work in his garden and mow the lawn,but now he feels short ofbreath after walking 100 feet. He done not have chest pain when he walk,although in the past he has experienced episodes of retrosternal chest pressure with strenuous exertion.Once recently he had felt lightheaded, as if he were about to faint while climbing a flight of stairs, but the symptom passed after he sat down.