Cross section of a skeletal muscle (200x) showing the muscle fibers (red) and the fat cells (white) Skeletal muscle is also called striated muscle, because when it is viewed under polarized light or stained with an indicator, you can see alternating stripes of light and dark. Skeletal muscle has a complex structure that is essential to how it contracts.
Patients with mitral valve prolapse may have imbalances in their autonomic nervous system, which regulates heart rate and breathing. Such imbalances may cause inadequate blood oxygen delivery to the working muscles during exercise, thereby causing fatigue.Palpitations are sensations of fast or irregular heart beats.nlike angina, chest pain with mitral valve prolapse rarely occurs during or after exercise, and may not respond to nitroglycerin. Anxiety, panic attacks, and depression may be associated with mitral valve prolapse. Like fatigue, these symptoms are believed to be related to imbalances of the autonomic nervous system.
Sources of imbalance can range from simple conditions (eg, dehydration) to serious conditions (eg, brain tumors). Central nervous system (CNS) problems must be distinguished from circulation anomalies, chemical and hormonal imbalances, and peripheral inner ear disorders. Often, this distinction is not clear.