Category: P

A group of unpleasant symptoms associated with unsynchronized atrioventricular timing in patients who have single-chamber (ventricular) pacemakers. The symptoms may include syncope or presyncope, orthostatic dizziness, cough, dyspnea, palpitations, and others. The symptoms are produced by the contraction of the atria against closed atrioventricular valves and by the loss of cardiac output that the atria…

An electronic permanent pacemaker in which one or more settings can be changed electronically.  

Small pits produced on the inner surface of the skull by protuberance of the pacchionian bodies (arachnoid villi).  

A germ cell that arises very early in the development of the embryo, usually in the yolk sac endoderm, migrates into the urogenital ridge, and is the precursor for the functional gamete.  

The emotional component of a symptom or illness that has an organic basis.  

In health care, the remediation of functional limitations or disability; the prevention of illness or injury; or an improvement in patient satisfaction.  

The formation of successive thin layers of bone by osteoblasts between the underlying bone or cartilage and the cellular and fibrous layer that covers the forming bone. Also called subperiosteal ossification.  

The formation of bone in abnormal sites or abnormal development of bone.  

The osmotic concentration of plasma. Normally the ionic concentration in the plasma is maintained within a narrow range: 275 to 295 mOsm/kg. When plasma osmolality increases above normal, antidiuretic hormone (ADH) [also called vasopressin] is released. ADH prevents loss of water by the kidney and thus decreases plasma osmolality. An increase in plasma osmolality also…

Purulent inflammation of the eye, usually due to gonococcus.