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Post exercise vasovagal syncope: Difference between revisions
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=== Neurally mediated syncope after exercise === | === Neurally mediated syncope after exercise === | ||
It appears that the underlying mechanism for neurally mediated syncope occurring after the termination of exercise are similar to that of PEH. The sudden removal of the muscle pump activity, decreasing cardiac preload, may be a trigger, along with a rapid return of vagal tone to the heart at the termination of exercise | It appears that the underlying mechanism for neurally mediated syncope occurring after the termination of exercise are similar to that of PEH. The sudden removal of the muscle pump activity, decreasing cardiac preload, may be a trigger, along with a rapid return of vagal tone to the heart at the termination of exercise. <cite>Krediet</cite> | ||
Characteristically, these events occur while the individual is standing motionless during the first 5 to 10 min after exercise <cite>Bjurstedt</cite><cite>Tsutsumi</cite>. Individuals rapidly recover in the supine position. It has been estimated that the incidence rate of neurally mediated syncope after routine treadmill testing may be in the order of 0.3-3 % <cite>Holtzhausen</cite>. However, when treadmill testing is immediately followed by passive head-up tilt testing, this percentage can increase up to 50-70% <cite>Holtzhausen</cite><cite>Sakaguchi</cite>. Neurally mediated syncope after exercise is considered to be a benign occurrence <cite>Krediet</cite>. | Characteristically, these events occur while the individual is standing motionless during the first 5 to 10 min after exercise <cite>Bjurstedt</cite><cite>Tsutsumi</cite>. Individuals rapidly recover in the supine position. It has been estimated that the incidence rate of neurally mediated syncope after routine treadmill testing may be in the order of 0.3-3 % <cite>Holtzhausen</cite>. However, when treadmill testing is immediately followed by passive head-up tilt testing, this percentage can increase up to 50-70% <cite>Holtzhausen</cite><cite>Sakaguchi</cite>. Neurally mediated syncope after exercise is considered to be a benign occurrence <cite>Krediet</cite>. | ||