Kelly goes to her general physician for a general checkup. This is he refers her to a cardiologist $($heart specialist$).$ This is an example of Kelly's general physician notices an arrhythmia $($irregular heart beat$),$ so $2$

Kelly needs heart surgery, so she she is admitted to the hospital for $6$ days for preparation and the surgery. Her hospital stay is an example of Following the hospital stay and successful surgery, she is transferred to a rehabilitation center for $2$ months to regain her strength. This is an example of