Hypermobile joints are joints that move beyond their normal range of motion with little effort from the individual.
“Cardiac resynchronization therapy” and “CRT (Cardiac Resynchronization Therapy)” redirect here. For the device termed a CRT-D, see Implanted cardiac resynchronization device. For other uses, see Pacemaker (disambiguation).
A pacemaker, scale in centimeters
An artificial pacemaker with electrode for transvenous insertion. The body of the device is about 4 centimeters long, the electrode measures between 50 and 60 centimeters (20 to 24 inches).
A pacemaker (or artificial pacemaker, so as not to be confused with the heart’s natural pacemaker) is a medical device that uses electrical impulses, delivered by electrodes contacting the heart muscles, to regulate the beating of the heart. The primary purpose of a pacemaker is to maintain an adequate heart rate, either because of the heart’s native pacemaker is not fast enough, or there is a block in the heart’s electrical conduction system. Modern pacemakers are externally programmable and allow the cardiologist to select the optimum pacing modes for individual patients. Some combine a pacemaker and defibrillator in a single implantable device. Others have multiple electrodes stimulating differing positions within the heart to improve synchronisation of the lower chambers of the heart.
Tuberous sclerosis, periungual fibroma. Flesh-colored periungual papule appearing in adolescence in an individual with tuberous sclerosis.
Tuberous sclerosis, fibrous plaque. Raised skin-colored plaque on the forehead of a child representing a connective tissue nevus.
Tuberous sclerosis, adenoma sebaceum. Small erythematous papules on the nose and cheeks of a child representing angiofibromata
Tissue whitening after treatment with the 532 nm frequency doubled Q-switched Nd:YAG. Tissue whitening is the appropriate endpoint when treating tattoos with Q-switched lasers.
Improvement after six treatments with 1064 nm Q-switched Nd:YAG laser. While improvement is not complete, the cosmetic result is far superior to that of dermabrasion.
Left shoulder tattoo with inferior scar resulting from prior treatment with dermabrasion.
Serum sickness. Urticarial, coalescing plaques on the lower legs of an adolescent with serum sickness.
Panniculitis from cold. Local exposure to cold leads to the formation of ice crystals within cells. Injury to cell contents occurs during both cooling and thawing.
Tiny white spots very often appear on a newborn’s face and gums during the first week. The spots are called milia (say “MIL-ee-uh”). Sometimes they also appear on the roof of the mouth (palate), where they are called Epstein pearls. Milia go away by themselves in a few weeks and aren’t harmful.
In the first few months of a baby’s life, any rash associated with other symptoms (such as fever, poor feeding, lethargy, cough) needs to be evaluated by a pediatrician as soon as possible.