Tachycardia during sleep is defined as a heart rate of 90 beats per minute for at least 30 seconds or longer. Which option correctly states this definition?

Tachycardia during sleep is defined as a heart rate of 90 beats per minute for at least 30 seconds or longer. Which option correctly states this definition?

• A. 90 bpm for 20 seconds
• B. 90 bpm for 30 seconds or longer
• C. 100 bpm for 60 seconds
• D. 80 bpm for 60 seconds

Answer: (B)

Tachycardia during sleep is defined by a heart rate reaching at least 90 beats per minute and staying elevated for a minimum of 30 seconds. This combination of threshold and duration makes sure the increase is sustained and clinically meaningful, not just a brief spike during arousal or movement. The option that states 90 bpm for 30 seconds or longer matches both parts exactly, so it’s the correct choice. The option with 90 bpm for 20 seconds fails the duration requirement, the one with 100 bpm for 60 seconds uses a different threshold and duration, and the one with 80 bpm for 60 seconds uses a lower threshold and does not meet the 90 bpm criterion.

Tachycardia during sleep is defined by a heart rate reaching at least 90 beats per minute and staying elevated for a minimum of 30 seconds. This combination of threshold and duration makes sure the increase is sustained and clinically meaningful, not just a brief spike during arousal or movement. The option that states 90 bpm for 30 seconds or longer matches both parts exactly, so it’s the correct choice. The option with 90 bpm for 20 seconds fails the duration requirement, the one with 100 bpm for 60 seconds uses a different threshold and duration, and the one with 80 bpm for 60 seconds uses a lower threshold and does not meet the 90 bpm criterion.