Ch 9 - Cardiac Rehabilitation Flashcards
What should all MI survivors receive?
Cholesterol lowering agent
Aspirin
Beta-blocker
What does aspirin reduce the risk of?
Subsequent MI, stroke, and death from cardiovascular causes by about 25%
What do Beta-blockers reduce the risk of?
Reduce mortality
and reinforce after MI and may be more effective in women than in men
What are non modifiable risk factors of heart disease?
Age
Male gender
Family history of CAD
Past history of CAD, PVD, CVA
What are modifiable risk factors of heart disease?
Hypertension Cigarette smoking Hyperlipidemia Diabetes mellitus Obesity Sedentary lifestyle Type A personality
Describe the 3 year survival rate post-MI in patients who do cardiac rehab vs those who do not.
Rehab: 95%
None: 65%
28% red in recurrent MI
What age do most MI’s occur?
50% of MI occurs in people under age 65
Describe phase I of cardiac rehab.
During acute inpatient hospitalization
Can last 1-14 days
Describe phase II of cardiac rehab.
Supervised outpatient cardiac rehab lasting 3 to 6 months, length determined by risk stratification
Describe phase III/IV of cardiac rehab.
Maintenance phase in which physical fitness and risk factor reduction are accomplished in a minimally supervised or unsupervised setting
What is the most closely monitored phase of cardiac rehabilitation?
Phase II
Immediate outpatient period
What are the two components of phase III cardiac rehab?
Intermediate and maintenance.
Describe the intermediate stage of cardiac rehab.
Follows immediate outpatient cardiac rehabilitation when the patient is not intensely monitored and/or supervised but is still involved in regular endurance exercise training and lifestyle change
What does Total oxygen consumption (VO2) represent?
Oxygen consumption of the whole body and corresponds to the work of the peripheral skeletal muscles rather than myocardial muscles
What is Aerobic capacity (VO2 max)?
Measure the maximum oxygen consumption that an individual can achieve during exercise expressed the milliliters of O2 consumed per kilogram of body weight per minute (mL O2/kg/min)
How can Aerobic capacity (VO2 max) be tested?
Treadmill or leg cycle ergometer testing
What is Myocardial oxygen consumption (MVO2)?
Actual oxygen consumption of the heart measured directly with cardiac catheterization
How can Myocardial oxygen consumption (MVO2) be estimated in a clinical setting?
Estimated MVO2 = rate pressure product (RPP) = SBP × HR
What is a Metabolic equivalent (MET)?
Ratio of working metabolic rate to basal (resting) metabolic rate
What does 1 Metabolic equivalent (MET) equal?
3.5 mL O2 consumed/kg of body weight/minute
1 MET = Energy consumption while at basal metabolic rate (seated rest)
What are outcomes of cardiac rehab?
- Improved Exercise Tolerance
- Improved Sx
- Improved Blood Lipid Levels
- Red Cigarette Smoking
- Improved Psychosocial Well-Being and Stress Red
- Red Mortality
- Safety
When should patients be mobilized after cardiac surgery?
As rapidly as possible to prevent decubitus,
pneumonia, and thromboembolism
What MET should rehab be during the acute period in coronary care unit?
Activities of very low intensity (1 to 2 METs)
What MET should rehab be during the subacute period in telemetry unit/medical ward?
Activities or exercises of intensity (3 to 4 METs)
What is the energy cost of low grade ambulation?
– 1 mph (slow stroll) = 1.5 to 2 METs
–2 mph (regular slow walk) = 2 to 3 METs
–Propelling wheelchair = 2 to 3 METs
What is Graded Exercise Testing (GXTs)?
Tests assess the patient’s to tolerate increased physical stress
How do cardiac rehab professionals use Graded Exercise Testing (GXTs)?
- Functional rather than diagnostic tools
- Risk stratification
- Limits and guidelines for exercise therapy
- Assess change over time
What MET do most ADL’s in the home environment require?
<4 MET
What exercise testing protocol is used for Lower extremity amputees?
Arm ergometers
What exercise testing protocol provides a common form of physiologic stress?
Treadmill testing subjects are likely to attain a higher VO2 max and peak heart rate than cycle ergometer
What are advantages of a cycle ergometer?
Less space
Less expensive
Better quality EKG and BP monitoring
What exercise testing protocol is appropriate for
high-risk patients with functional capacity of <7 METs?
Balke-Ware protocols that increase metabolic demands by 1 MET per stage
What exercise testing protocol is appropriate for
low to intermediate risk patients with functional capacity of >7 METs?
Bruce protocol with metabolic demands of >2 METs per stage
When is Bruce protocol used?
Bruce Protocol of 2 to 3 METs per stage is useful with stable patients with functional capacities of 10 METs
What can Pharmacologic stress testing in debilitated patients for whom exercise testing cannot be performed
be used for?
Evaluate ischemia
Cannot be used in exercise presumption
What is the MET of a slow walk (2 mph)?
2-3 METs
What is the MET of a regular speed walk (3 mph)?
3-4 METs
What is the MET of a brisk walk (3-5 mph)?
4-5 METs
What is the MET of a very brisk walk (4 mph)?
5-6 METs
What is the MET of Sexual intercourse?
3-4 METs
What is the MET of Outdoor work—shovel snow, spade soil?
7 METs
What is the MET of jog, walk (5 mph)?
9 METs
What is the MET of mopping the floor?
2-4 METs
What is the MET of Pushing a power lawn mower?
4 METs
What is the MET of Golf?
2-5 METs
What is the MET of Bowling?
4-5 METs
What is the MET of Volleyball?
3-4 METs
What is the MET of Ping pong?
3-6 METs
What is the MET of Tennis?
4-7 METs
What is the MET of Roller-skating?
5-6 METs
When is sexual intercourse not recommended after MI?
2 weeks post MI
What is target HR?
70% to 85% of the maximum HR
What is the Borg Rating of Perceived Exertion (PRE) Scale?
Linear scale of rating from 6 to 20 of physical exertion and correlates linearly with HR, ventricular O2 consumption, and lactate levels
What is the duration and frequency of exercise recommended by ACSM?
– Moderate cardio exercise for >30 min for >five days/week
– Vigorous cardio exercise >20 minutes for >5 days/week or combo to achieve a total energy expenditure of 500- 1,000 MET min/week
–Resistance and neuromotor exercise involving balance, agility, and coordination 2-3 days/week
What is an Orthotopic heart transplantation (OHT)?
■Donor heart excised w/ intact RA and a long segment of SVC
■Donor LA is sutured to the stump of 4 pulmonary veins in the recipient
■Superior and inferior venae cavae are sutured to the recipient atrial cuff and great arteries are anastomosed
What % of cardiac transplants are Orthotopic heart transplantation (OHT)?
99%
What is a Heterotopic transplantation?
Recipient heart is left in place to assist the donor heart
What does a transplanted heart lack?
Vagal innervation (PNS tone) from the body and vagal inhibition to the sinoatrial (SA) node
What are physiologic changes after heart transplant?
- High resting HR d/t PNS denervation
- Lower peak exercise HR
- Resting HTN d/t renal effects of anti-rejection medications
- Slower return to resting HR postexercise
- Lower work capacity, CO, SBP, and the total O2 consumption (VO2) at max effort
- Pretransplantation rehab strength training may enhance preop and postop recovery
- 5- and 10-year survival ~85% and 75%
- Accelerated atherosclerosis
How does exercise improve PAD and walking economy?
Increasing biomechanical and metabolic efficiency
What can be used instead of anti-coagulation if risk of hemorrhage is high in non-valvular Afib?
ASA 325 mg
Describe the results of the 1996 Copenhagen Stroke Study that measured the consequences of stroke with AF compared to those with sinus rhythm.
–Poorer neuro and functional outcomes –Higher mortality –Longer hospital stays –Lower discharge rates to home –Poorer outcome
Describe sedentary work.
Lifting <10 lbs
Walking/standing occasional
Describe light work.
Lifting <20 lbs
Fair amount of walking/standing
Describe Medium work.
Lifting <50 lbs
Frequent carrying up to 25 lbs
Describe Heavy work.
Lifting <100 lbs
Frequent carrying up to 50 lbs
Describe Very Heavy work.
Lifting >100 lbs
Frequent carrying >50 lbs