During sleep, a sustained heart rate of 90 beats per minute or higher for 30 seconds or longer is termed what?

During sleep, a sustained heart rate of 90 beats per minute or higher for 30 seconds or longer is termed what?

• A. Atrial fibrillation
• B. Left bundle branch block
• C. Bradycardia
• D. Tachycardia

Answer: (D)

A sustained elevated heart rate during sleep indicates tachycardia. This term describes a heart rate that is faster than normal resting levels, here defined as 90 beats per minute or more for at least 30 seconds. Atrial fibrillation would show an irregular rhythm with variable spacing between beats and no consistent P waves; left bundle branch block is a conduction abnormality that widens the QRS complex; bradycardia refers to a slower-than-normal rate, typically below 60 bpm. So the label for a sustained 90+ bpm rate is tachycardia.

A sustained elevated heart rate during sleep indicates tachycardia. This term describes a heart rate that is faster than normal resting levels, here defined as 90 beats per minute or more for at least 30 seconds. Atrial fibrillation would show an irregular rhythm with variable spacing between beats and no consistent P waves; left bundle branch block is a conduction abnormality that widens the QRS complex; bradycardia refers to a slower-than-normal rate, typically below 60 bpm. So the label for a sustained 90+ bpm rate is tachycardia.