Cardiac rehabilitation is defined by the World Health Organization (WHO) as "The sum of activity and interventions required to ensure the best possible physical, mental, and social conditions so that patients with chronic or post-acute cardiovascular disease may, by their own efforts, preserve or resume their proper place in society and lead an active life".
Cardiac rehabilitation is a comprehensive exercise, education, and behaviour modification program with a goal of helping patients restore and maintain optimal health while helping to reduce the risk of future heart problems.
CR services can be provided during hospitalization for the event or in an outpatient setting. While the "glue" of cardiac rehabilitation is exercise, programs are evolving to become comprehensive prevention centers where all aspects of preventive cardiology care are delivered. This includes nutritional therapies, weight loss programs, management of lipid abnormalities with diet and medication, blood pressure control, diabetes management, and stress management. CR exercise and prevention programs are supported by the American Heart Association and the American College of Cardiology.
Patients typically enter cardiac rehabilitation in the weeks following an acute coronary event such as a myocardial infarction (heart attack), coronary artery bypass surgery, with a diagnosis of heart failure, replacement of a heart valve, percutaneous coronary intervention (such as coronary stent placement), placement of a pacemaker, or placement of an implantable cardioverter defibrillator. A 2017 Cochrane review showed similar short-term benefits from home- and centre-based rehabilitation, though there was not sufficient data to know whether this is sustainable over time.
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Patients receiving CR in the hospital after surgery are usually able to begin within a day or two. First steps include simple motion exercises that can be done sitting down, such as lifting the arms and legs. Heart rate is monitored and continues being monitored as the patient begins to walk.
Most patients wishing to participate in outpatient CR are able to begin within 4–6 weeks after surgery. In order to participate in an outpatient program, the patient must first obtain a physician's referral. Participation typically begins with an intake evaluation that includes measurement of cardiac risk factors such as lipid measures, blood pressure, body weight, and smoking status. An exercise stress test is usually performed both to determine if exercise is safe and to allow for the development of a custom exercise program. During exercise, the patient's heart rate and blood pressure are monitored to check the intensity of activity.
Short and long-term risk factors and goals are established, and patients are closely monitored by a "case-manager" who may be a cardiac-trained Registered Nurse, Physiotherapist, respiratory therapist, or an exercise physiologist. A dietitian helps create a healthy eating plan, and a counselor may help to alleviate stress or, for smokers, may give counseling on how to quit.
The duration of the program varies from patient to patient and can range from six months to several years. Even after CR is finished, there are long-term maintenance programs that should not be minimized, as benefits are maintained only with long-term adherence.
Cardiac rehabilitation services are significantly underused in the United States, with only 19–29% of patients with eligible cardiac diagnoses participating. Underuse is related to many factors, including lack of available programs nearby and low referral rates by physicians, who often focus more attention on better reimbursed cardiac-intervention procedures than on long-term lifestyle treatments. With a contemporary focus on the cost-effectiveness of medical interventions, CR programs are well-positioned to assume a more prominent role in the long-term care of patients with coronary heart disease.
The use of cardiac rehabilitation is well established in the scientific community. Excerise based programs have been shown to improve cardiac fitness as well as the microvacular response. A Cochrane Review of 147 studies demonstrated that for myocardial infarction and heart failure patients, exercise-based cardiac rehabilitation improves quality of life and reduces readmission rates. However, there was no benefit in mortality. There appears to be no difference in outcomes between inpatient and outpatient programs. Rehabilitation programs that only have an educational or psychological component have not been shown to be effective. Another Cochrane Review of six randomised controlled trials in adults with atrial fibrillation found that exercise-based rehabilitation may improve physical exercise capacity, but there was no effect on health-related quality of life. Due to the limited number of trials, the authors could not estimate the impact on mortality or serious adverse events.
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Cardiac rehabilitation begins during hospitalization, not after discharge. Today’s heart-attack patient who is free of complications is likely to be up and about in a day or two.
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