With the first ribs fixed by neck muscles (scalene muscles and sternocleidomastoid muscle), the intercostals muscles (especially external intercostal muscles and interchondral part of internal intercostal muscles of opposite side), elevate the 2nd to 12th ribs and thus act as inspiratory muscles.
Medical Dictionary. arrhythmia. play. noun arÂ·rhythÂ·mia \Ä-Ërith-mÄ-É\. Medical Definition of arrhythmia. : an alteration in rhythm of the heartbeat either in time or force.
Transcript: Arrhythmia, or heart rhythm disorder, is a general term for an irregular heartbeat. Most arrhythmias are not dangerous, but some may indicate serious underlying heart disease and some can lead to serious problems such as loss of consciousness, stroke and sudden cardiac death.n fact, about 2.2 million Americans have a type of arrhythmia called atrial fibrillation-and that is only one type of rhythm problem. Some arrhythmias can lead to serious problems, including heart disease, stroke or sudden cardiac death.