Final answer:
Bradycardia needs treatment when it leads to hypotension or other symptoms indicating insufficient oxygenated blood supply to the tissues. Identifying the underlying cause is essential for appropriate intervention, which may involve the use of a pacemaker or supplemental oxygen.
Step-by-step explanation:
Bradycardia, a condition where the resting heart rate drops below 60 beats per minute (bpm), requires treatment when it is symptomatic and associated with other complications. Treatment is needed when bradycardia is accompanied by signs suggesting that the heart is not providing sufficient oxygenated blood to the tissues. These signs include hypotension (low blood pressure), weakness, fatigue, dizziness, fainting, chest discomfort, palpitations, or respiratory distress.
Several factors can cause bradycardia, such as abnormalities in the sinoatrial (SA) or atrioventricular (AV) nodes, ischemic heart disease, metabolic disorders, thyroid pathologies, electrolyte imbalances, neurological disorders, and the over-prescription of beta-blocker drugs. Establishing the underlying cause of the disorder is crucial for treatment, which may include the use of a pacemaker in severe cases or supplemental oxygen when necessary.