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Tachycardia
A heart rate usually greater than 100 beats per minute. If this is a normal response to exercise, stress, or illness, it is called sinus tachycardia.
Tachyarrhythmia
Any disturbance of the heart's rhythm, regular or irregular resulting in a rate over 100 beats per minute. Causes of tachyarrhythmias include heart attack, coronary artery disease, and cardiomyopathy.
Threshold
Any disturbance of the heart's rhythm, regular or irregular resulting in a rate over 100 beats per minute. Causes of tachyarrhythmias include heart attack, coronary artery disease, and cardiomyopathy.
Threshold
the lowest amount of electrical energy necessary to cause the heart to contract.
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