Abnormal heart rhythms (arrhythmias) are sequences of heartbeats that are irregular. They’re too quick, too slow, or conducted via an abnormal electrical pathway via the heart. Heart rhythms differ from 1 person to the other
. Wellness, age and fitness are typically key aspects. The heart is often a muscular organ with four chambers, designed to function efficiently, reliably, and continuously over a lifetime. The muscular walls of each chamber contract in a regulated sequence, pumping blood as required by the body though expending as little energy as achievable in the course of each heartbeat.
Contraction of the muscle fibers inside the heart is controlled by electricity. This flows through the heart in a precise manner, along distinct pathways and at a controlled speed. The electrical present that begins every heartbeat, originates in the heart’s pacemaker, located inside the top of the upper correct heart chamber (proper atrium). The rate at which the pacemaker discharges the electrical current determines the heart rate. This rate is influenced by nerve impulses and levels of specific hormones inside the bloodstream.
The heart rate is regulated automatically by the autonomic nervous method, which consists of the sympathetic and parasympathetic divisions. The sympathetic division increases the heart rate by way of a network of nerves called the sympathetic plexus. The parasympathetic division decreases the heart rate by means of a single nerve, the vagus nerve.
In an adult at rest, the heart rate is normally between sixty and 1 hundred beats per minute. Nonetheless, lower rates could be regular in young adults, especially people who are physically fit. A person’s heart rate varies normally in response to physical exercise and such stimuli as pain and anger. Heart rhythm is regarded as abnormal only when the heart rate is inappropriately quick (known as tachycardia) or slow (called bradycardia), or is irregular, or when electrical impulses travel along abnormal pathways.
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