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Exercise intolerance is a condition of inability or decreased ability to perform physical exercise at the normally expected level or duration for people of that age, size, sex, and muscle mass. [1] It also includes experiences of unusually severe post-exercise pain, fatigue, nausea, vomiting or other negative effects.
The Bruce protocol is a standardized diagnostic test used in the evaluation of cardiac function and physical fitness, developed by American cardiologist Robert A. Bruce. [1] According to the original Bruce protocol the patient walks on an uphill treadmill in a graded exercise test with electrodes on the chest to monitor.
However, an exercise stress test may provide more information about exercise tolerance than a pharmacologic stress test. [37] Commonly used agents include: Vasodilators acting as adenosine receptor agonists, such as adenosine itself, and dipyridamole (Persantine), [38] which acts indirectly at the receptor.
The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen ...
Before the development of the Bruce Protocol, there was no safe, standardized protocol that could be used to monitor cardiac function in exercising patients.Master's Two-Step Test was sometimes used, but it was too strenuous for many patients and inadequate for the assessment of respiratory and circulatory function during varying amounts of exercise.
Angina index is zero if no pain occurs during the exercise, one if the pain is limited to the exercise period but the patient can continue the exercise (typical angina), and two if a pain is a reason to stop the exercise test. [2] [3] Duke treadmill scores typically range from –25 (highest risk) to +15 (lowest risk).
The talk test is a sub-maximal, incremental exercise test which allows individuals to recognise their exercise training intensity. [9] The self-administered test allows individuals the ability to determine if they are exercising at the appropriate heart rate and intensity level based on their ability to speak comfortably whilst exercising.
CPVT is often diagnosed from an ECG recorded during an exercise tolerance test, but it may also be diagnosed with a genetic test. The condition is treated with medication including beta-adrenoceptor blockers or flecainide, or with surgical procedures including sympathetic denervation and implantation of a defibrillator. It is thought to affect ...
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