What is the Bruce Treadmill Protocol?

The Bruce Treadmill Protocol is a test run for prognosis of the cardio respiratory functions of the heart and lungs. It is both an effective, and the most cost-efficient, way of arriving at the condition of a person's heart.

Developed by Robert A. Bruce, the Bruce Treadmill Protocol is a standardized test used for determining, diagnosing and evaluating the functions of the heart and lungs.

Started in the 1940's, Robert Bruce aimed for a method of safely measuring cardio and respiratory performance, determining aerobic capacity and observing mechanisms of cardiac impairment. Timing proved to be essential, too, as in the same timeframe, technological advances, such as the motorized treadmill and the electrocardiograph aided Bruce in coming up with important first steps towards the realization of the Bruce Treadmill Protocol.

Initially, the test involved a ten-minute walk on the treadmill for the patients with a fixed load. This analyzed changes in respiration and circulation by the minute in normal adults with chest disease. Prior to the Bruce Treadmill Protocol, there was no real means of evaluating cardiovascular functions of patients during physical activity. Most tests relied on patient complaints during physical exertion without real assessment performed during physical activities. Tests were generally done when the patient was at rest, due to the dangers of exertion to people with heart or lung ailments.

The Bruce Treadmill Protocol changed all that. The initial tests proved that, within a controlled environment, even heart patients could be tested for cardiovascular and respiratory health during a physical activity safely. Electrodes from the electrocardiograph were affixed to the patient together with gas measuring devices and oxygen analyzers.

The 1950's saw Robert Bruce join the University of Wisconsin as their first-ever head of cardiology. His initial, single staged test was used for more predictive undertakings for cardiac patients, the most notable being its ability to predict the success of valvular or congenital heart disease surgery. Later, he developed the multi stage test that included progressive stages with equally heavier work loads as one went up the test. This was a great move since it enabled Bruce to detect signs of several illnesses including previous heart attacks, ventricular aneurisms, coronary artery disease and the like. This was called the Bruce Treadmill Protocol, which came out in published text in 1963.

The Bruce Treadmill Protocol established standard responses and divided the signs as to whether caused by age or disease. The Bruce Treadmill Protocol was the main tool used in the 1971 Seattle Health Watch, an intensive study on the practicability and safety of hospital exercise testing, its use in the corporate and office setting and industrial medical departments. Here, the Bruce Treadmill Protocol proved to be a valuable prognostic device.

Currently, the Bruce Treadmill Protocol is used in 70 per cent of cardiovascular function tests performed annually. Physicians swear to it and acknowledge its importance, even in the face of more sophisticated tests involving newer technology. The Bruce Treadmill Protocol remains a safe, cheap and accurate process preferred by many.

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