Bradycardia

Bradycardia ( /ˌbrædɪˈkɑrdiə/; Greek βραδυκαρδία, bradykardía, "heart slowness"), in the context of adult medicine, is the resting heart rate of under 60 beats per minute, though it is seldom symptomatic until the rate drops below 50 beats/min. It may cause cardiac arrest in some patients, because those with bradycardia may not be pumping enough oxygen to their hearts. It sometimes results in fainting, shortness of breath, and if severe enough, death.

Trained athletes or young healthy individuals may also have a slow resting heart rate (e.g. professional cyclist Miguel Indurain had a resting heart rate of 28 beats per minute). Resting bradycardia is often considered normal if the individual has no other symptoms such as fatigue, weakness, dizziness, lightheadedness, fainting, chest discomfort, palpitations or shortness of breath associated with it.

The term relative bradycardia is used in explaining a heart rate which, although not actually below 60 beats per minute, is still considered too slow for the individual's current medical condition.

Read more about BradycardiaDefinition, Causes, Diagnosis, Management

Other articles related to "bradycardia":

Bezold–Jarisch Reflex - Physiology
... They may respond by sending signals that trigger paradoxical bradycardia and decreased contractility, resulting in additional and relatively sudden arterial hypotension ... The Bezold–Jarisch reflex is responsible for the sinus bradycardia that commonly occurs within the first 60 minutes following an acute myocardial infarction ... Bradycardia in this setting may be treated with atropine ...
Athletic Heart Syndrome - Signs and Symptoms
... heart condition if they were seen in a non-athlete bradycardia, cardiomegaly, and cardiac hypertrophy ... Bradycardia is a slower than normal heartbeat around 40-60 beats per minute ... The raised cardiac output allows the heart to beat more slowly (hence the bradycardia) ...
Sinus Bradycardia - Signs and Symptoms
... Bradycardia is not necessarily problematic ... People who regularly practice sports may have sinus bradycardia, because their trained hearts can pump enough blood in each contraction to allow a low resting heart rate ... Sinus Bradycardia can aid in the sport of Freediving, which includes any of various aquatic activities that share the practice of breath-hold underwater diving ...
Reflex Bradycardia
... Reflex bradycardia is a bradycardia (decrease in heart rate) in response to the baroreceptor reflex, one of the body's homeostatic mechanisms for ... pressure, the baroreceptor reflex produces a reflex bradycardia as a method of decreasing blood pressure by decreasing cardiac output ... In reflex bradycardia, blood pressure is reduced by decreasing cardiac output (CO) via a decrease in heart rate (HR) ...
Bradycardia - Management - Unstable
... Transvenous pacing may be required if the cause of the bradycardia is not rapidly reversible ...