I am on a beta blocker. The normal resting heart rate should be around 70, but may be higher with decrease cardiac function or low if good condition or beta blocker. Yes a lower heart rate is good most of the time. It decreases the amount of work your heart has to do. Jay 52 a heart rate of 60 is the target the many doc aim for when they place people on beta blockers.
Many people can do use heart rate for determine how hard they exercise.
Heart rate of 47, no change in physical condition. I will post on the message board more information on this scale. I'm sorry I do not have a reference with me at this time. It sounds like most are on beta blockers which is great. It has been one things that has shown to drcrease complications after a heart attack.