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.
Difference Between Arrhythmia and Dysrhythmia. Both arrhythmia and dysrhythmia mean the same. Arrhythmia means no regular rhythm and dysrhythmia means abnormal rhythm. Disturbances of cardiac rhythm or arrhythmias are common in people, often benign, and often intermittent. However, they can be severe sometimes leading to cardiac compromise.