I am a reasonably fit 52 year old man who cannot climb any stairs, even a relatively short 5 steps or so, without feeling lightheaded 20-30 seconds after completing the climb. I have been diagnosed with high blood pressure and take Cozaar in the morning. I ve never had a low blood pressure reading. This effect is much stronger after eating. Is this a heart problem, or something else?
Hello Sir, Considering the age of 52 years and as the symptoms occurs characteristically on exertion i.e. When you climb stairs, heart as the cause should be ruled out on priority.  A baseline 2 d echocardiography and if normal, a treadmill stress test is the best way forward as here you would no if any symptoms, ECG changes and blood pressure response on exercise helping us make a diagnosis.  Regards Chat Doctor.