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Cardiopulmonary Exercise Testing (CPX) has been
used in clinical settings for a number of years. It helps to answer vital questions
relating to exercise intolerance, exercise limitation and patient management.
CPX essentially quantifies the capacity of the heart and lungs during exercise.
Because outcome following surgery is related to cardiovascular capacity and
the ability to maintain increased performance post-operatively, CPX is the
ideal predictive tool. CPX has also been used in respiratory and cardiac rehabilitation
programmes. CPX testing is non-invasive, well tolerated by patients and very
cost effective.
When is CPX testing indicated?
- For patients with cardio-pulmonary
limitation who require pre-operative objective assessment to
determine cardiopulmonary reserve prior to moderate
to high risk elective procedures
- To assist medical teams to differentiate between cardiac and
pulmonary limitation, for example, as a cause of exercise induced dyspnea
- To objectively evaluate symptomatic patients with respiratory disease
- To triage high risk patients presenting with heart failure
- To objectively evaluate a patient’s response to specific therapeutic
interventions such as changes in cardiac and respiratory medications and
alterations to pacemaker settings
- To help design and manage cardiac and respiratory
rehabilitation programmes
- As a screening test for the presence of early cardiopulmonary disease
What data is measured throughout the test duration?
Cardiovascular measurements
- Resting and exercise 12 lead ECG
- Resting and exercise blood pressure measurements
- Oxygen consumption (V02)
- Anaerobic threshold (AT)
- Stroke index (indication
of left ventricular function)
Respiratory measurements
- Resting lung spirometery testing
- Exercise flow volume loop recordings
- Resting and exercise pulse oximetery monitoring
- Respiratory rate (RR)
- Tidal volume (Vt)
- Minute ventilation (VE)
- Carbon dioxide (VC02) production
- Ventilatory equivalents (VEV02 and VEVC02)
- End tidal oxygen and carbon dioxide tensions
- Breathing reserve (BR)
- Breathing efficiency
To refer a patient
Should you wish to refer a patient for CPX testing
please complete the request form (>>download
PDF) and fax it over to us at
CPX Ltd. on 020 7616 7688
For all other enquiries please contact us by email (>>click
here to view the contact page)
or telephone 020 7616 7664
See our Links Page for more resources on pre-operative assessment
and heart failure assessment (click here to view
the links page).
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