Had my appt with the cardiologist yesterday. Taking two routes. Stress test, looking for an electrical problem. Second is lung capacity testing. That one worries me most. My breathing is progressively worse, the weakness in muscles is coming on very quick. Heart rate is 56 - 60 bpm and doesn't accelerate quickly enough causing dizzyness, visual auras, un balanced and blackout. Can only walk at a leisurely pace now, no hills. Out of breath within minutes of exertion. Using an inhaler now and down to 10 cigs a day, from whole pack. Worried about the lung tests because my Father has COPD. The nurse will be calling me for times and dates for the tests, hope it's soon.