Lecture 1 Flashcards
Testing for Clinical Populations
- Medical Evaluation
- Resting ECG
- Resting echocardiogram
- Graded Exercise Test
- —ECG
- —ECG + Open Circuit Spirometry (measure expired gases)
- —ECG + Nuclear Imaging
- Pharmacologic Stress Testing: medication to increase HR
- Cardiac Imaging: picture of the Heart
Indications for GXT
- Diagnostic
- Prognostic
- Therapeutic
Diagnostic
- used to diagnose Coronary Artery Disease
- often conducted with patients off medications
Prognostic
- disease progression and prognosis
- improved with expired gas analysis
Therapeutic
- Effectiveness of therapy
- Functional capacity determination (peak METs)
- Conducted with patients on medications
Can we do something to improve the prognosis?
- increase METs (workout)
- medication (decrease ST seg depression)
Contraindications to GXT
ABSOLUTE
- absolute concern
- potential of serious complications
RELATIVE
- possible medical concern
- evaluation of risks and benefits
Who can perform Exercise Tests?
TRAINED PROFESSIONALS
- clinical exercise physiologist
- nurse
- physical therapist
- physicians
DOCTORS
- might need to be present with high risk patients
- in clinical settings (usually in near proximity)
Risks of GXT
incidence of death of major event requiring hospitalization
—-1-10 per 10,000 tests
Risks of Vigorous Exercise
-higher risk of sudden cardiac death or myocardial infarction in people with diagnosed or occult cardiovascular diseases than healthy people
Modalities
TREADMILLS LEG CYCLE ERGOMETER -electronically braked (preferred) -mechanically braked ARM ERGOMETER OTHER ERGOMETER
Protocols
ESTABLISHED PROTOCOLS -e.g. Naughton, Cornell, Bruce, Ramping Bruce CUSTOMIZED INDIVIDUALIZED PROTOCOLS -usually ramping SOUND PROTOCOL SELECION IS KEY APPROPRIATE PROTOCOL
Appropriate Protocol is one that:
- fits the individual
- produces true VO2 peak (without premature fatigue)
- takes about 8-12 minues
Most common protocol
ramping
Ramping Protocol
Work rate is gradually increased
- ramping bruce
- individualized
Avoid large changes in workload
Cycle Ramp Protocols