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Wiktionary
bradycardia

n. The condition of having a slow heartbeat, defined as under 60 beats per minute for an adult.

WordNet
bradycardia

n. abnormally slow heartbeat

Wikipedia
Bradycardia

Bradycardia, also known as bradyarrhythmia, is a slow heart rate, defined as a heart rate of under 60 beats per minute (BPM) in adults. Bradycardia typically does not cause symptoms until the rate drops below 50 BPM. When symptomatic, it may cause fatigue, weakness, dizziness, and at very low rates, fainting.

During sleep, a slow heartbeat with rates around 40–50 BPM is common, and is considered normal. Highly trained athletes may also have athletic heart syndrome, a very slow resting heart rate that occurs as a sport adaptation and helps prevent tachycardia during training.

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

Usage examples of "bradycardia".

If she only has occasional bradycardia, why use the dual-chambered model?

Hitting the brake can throw the body into a terminal bradycardia, meaning that the heart slows down to the point where it can stop.

Red shocks her, and gets the pulse back, bradycardia with ventricular escape beats.

The paralytic ileus, the stress ulcers, hypotension and bradycardia, bedsores turning into decubitus ulcers, contractures as the muscle tissue began to shrink and threatened to steal away the precious mobility of his finger, the infuriating phantom pain—burns and aches in extremities that could feel no sensation.

The paralytic ileus, the stress ulcers, hypotension and bradycardia, bedsores turning into decubitus ulcers, contractures as the muscle tissue began to shrink and threatened to steal away the precious mobility of his finger, the infuriating phantom pain-burns and aches in extremities that could feel no sensation.

The poison had also shown some relation to minoxidil, with the ef­fects of bradycardia, heart failure, hypotension, and depressed respiration-which would help to render the victim unable to recover from the orellanine look alike.

The paralytic ileus, the stress ulcers, hypotension and bradycardia, bedsores turning into decubitus ulcers, contractures as the muscle tissue began to shrink and threatened to steal away the precious mobility of his finger, the infuriating phantom pain—.