Question

The Q-T interval can be most accurately measured if it is corrected for the patient's heart rate, and this corrected interval is noted as QTc. The corrected Q-T interval is calculated as the Q-T interval divided by the square root of the R-R interval. The Q-T interval varies with age, gender, and heart rate. As the heart rate increases, the Q-T interval _________. As the heart rate decreases, the Q-T interval _________. The Q-T interval is considered short if it is 0.## second or less and prolonged if it is 0.## second or longer in women or 0.## second or longer in men.

Answer 1

The Q-T interval decreases as heart rate increases and increases as heart rate decreases. The corrected Q-T interval (QTc) is obtained by dividing the Q-T interval by the square root of the R-R interval. The Q-T interval is considered short or prolonged based on specific time measurements.

Step-by-step explanation:

The Q-T interval varies with age, gender, and heart rate. As the heart rate increases, the Q-T interval decreases. As the heart rate decreases, the Q-T interval increases. To accurately measure the Q-T interval, it should be corrected for the patient's heart rate by calculating the corrected Q-T interval (QTc). The QTc is obtained by dividing the Q-T interval by the square root of the R-R interval.

The Q-T interval is considered short if it is 0.## second or less and prolonged if it is 0.## second or longer in women or 0.## second or longer in men.