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Palpitations occur when a person becomes aware of their heartbeat. The heartbeat may feel hard, fast, or uneven in their chest. [1] [2] Symptoms include a very fast or irregular heartbeat. Palpitations are a sensory symptom. [1] They are often described as a skipped beat, a rapid flutter, or a pounding in the chest or neck. [1] [2]
Sleeping and waking up at different times is associated with an increased risk of heart attack and stroke, even for people who get the recommended amount of sleep, according to new research.
The build-up of plaque is also called atherosclerosis. ... An irregular and often very fast heart rate. ... Trouble seeing from one or both eyes. Trouble walking or loss of balance and coordination.
More than 2 million adults in the U.S. have atrial fibrillation, which causes an irregular heartbeat, according to the National Heart, Lung, and Blood Institute (NHLBI).
Re-entrant arrhythmias occur when an electrical impulse recurrently travels in a tight circle within the heart, rather than moving from one end of the heart to the other and then stopping. [28] [29] Every cardiac cell can transmit impulses of excitation in every direction but will do so only once within a short time.
Long QT syndrome (LQTS) is a condition affecting repolarization (relaxing) of the heart after a heartbeat, giving rise to an abnormally lengthy QT interval. [7] It results in an increased risk of an irregular heartbeat which can result in fainting, drowning, seizures, or sudden death. [1] These episodes can be triggered by exercise or stress. [6]