A relative scale of energy requirements related to heart function necessary for performing vaiious daily activities has been used to describe ihe functional status of cardiac patients. A MET is an energy unit defined as the use of 3.5 mL of oxygen per minute per kilogram of body weight. For example, approximately 3 METs are required for walking, sitting, or other ordinary activities necessary for an individual to be self-sufficient. Patients with a functional capacity of 7-9
METs have the capability of undertaking vigorous activities such as sawing wood, mountain climbing, and heavy calisthenics and of resuming their norma] pre-cardiac-event activities. Generally, any cardiac patient minimally attains the ability to exercise to 3 ~ETs'without cardiac symptoms before leaving the hospital. Most patients entering the Phase I1 cardiac rehabilitation program have the ability to carry out activities requiring more METs.
METs have the capability of undertaking vigorous activities such as sawing wood, mountain climbing, and heavy calisthenics and of resuming their norma] pre-cardiac-event activities. Generally, any cardiac patient minimally attains the ability to exercise to 3 ~ETs'without cardiac symptoms before leaving the hospital. Most patients entering the Phase I1 cardiac rehabilitation program have the ability to carry out activities requiring more METs.
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