Best of luck. Any cardio work is serious stuff. My first stent was recently placed in the Widowmaker (Left Anterior Descending artery). Doc said it was 99% blocked, typically fatal. Fairly fit, do a lot of swimming and stationary biking. Doc said this activity strengthened heart muscle and likely saved my life. He also said...past 50, no such thing as chest discomfort, irritation, ache, soreness, et al., treat all as chest PAIN.
