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.
1. disturbance of rhythm. 2. an abnormal cardiac rhythm; the term arrhythmia is usually used, even for abnormal but regular rhythms.dysrhythÂ´mic. cerebral dysrhythmia , electroencephalographic dysrhythmia a disturbance or irregularity in the rhythm of the brain waves as recorded by electroencephalography.