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| Q. |
Tachycardia is a condition characterized by |
| A. | heart-rate decreases from the normal |
| B. | heart- rate increases from the normal |
| C. | heart-beat stops |
| D. | heart fails to pump |
| Answer» B. heart- rate increases from the normal | |
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Explanation: Tachycardia is a heart rate that exceeds the nor-mal resting rate. In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. A healthy adult heart normally beats 60 to 100 times a minute when a person is at rest. Tachycardia occurs when an abnormality in the heart produces rapid electrical signals. |
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