What defines 'bradycardia' in a patient?

Bradycardia is defined as a heart rate that is less than 60 beats per minute. This condition indicates that the heart is beating slower than the normal resting heart rate, which typically ranges from 60 to 100 beats per minute in adults.

In clinical practice, recognizing bradycardia is important because it can be a sign of various underlying issues, such as increased vagal tone, certain medications, or cardiac conduction system abnormalities. Patients with bradycardia may experience symptoms like dizziness, fatigue, or fainting, especially if the heart rate is significantly low, necessitating assessment and potential intervention.

The other options describe heart rates that do not meet the criteria for bradycardia, with one stating a heart rate exceeding 100 beats per minute, which is indicative of tachycardia. Another option refers to a heart rate that fluctuates widely, which does not define bradycardia but rather indicates arrhythmia. The final option specifies a heart rate of precisely 60 beats per minute, which is on the border of normal and should not be classified as bradycardia; it is crucial to be aware that anything less than 60 beats per minute is necessary to fit the definition.