Why the study?
Does excessive exercise-induced tachycardia adversely affect cardiac output in patients with chronic isolated atrial fibrillation?
Does excessive exercise-induced tachycardia adversely affect cardiac output in patients with chronic isolated atrial fibrillation?
In patients with isolated atrial fibrillation and normal resting cardiac function, excessive exercise-induced tachycardia does not impair the normal increase in cardiac output, suggesting that aggressive suppression of exercise heart rate may be unnecessary.
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Supports preserved cardiac output despite tachycardia in isolated AF; hypothesis-generating and should not yet change rate-control practice.
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Masatsugu Iwase (1994) studied this question.
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