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Long QT syndrome (LQTS) is a condition affecting repolarization (relaxing) of the heart after a heartbeat, giving rise to an abnormally lengthy QT interval. [7] It results in an increased risk of an irregular heartbeat which can result in fainting, drowning, seizures, or sudden death. [1]
Mutations in the same genes can produce milder Romano-Ward forms of long QT syndrome if only a single copy of the genetic mutation has been inherited. [ citation needed ] About 90% of cases of Jervell and Lange-Nielsen syndrome are caused by mutations in the KCNQ1 gene, leading to Jervell and Lange-Nielsen syndrome type 1 (JLNS1).
Andersen–Tawil syndrome, also called Andersen syndrome and long QT syndrome 7, is a rare genetic disorder affecting several parts of the body. The three predominant features of Andersen–Tawil syndrome include disturbances of the electrical function of the heart characterised by an abnormality seen on an electrocardiogram (a long QT interval) and a tendency to abnormal heart rhythms ...
Romano–Ward syndrome is the most common form of congenital Long QT syndrome (LQTS), a genetic heart condition that affects the electrical properties of heart muscle cells. [5] Those affected are at risk of abnormal heart rhythms which can lead to fainting, seizures, or sudden death.
Timothy syndrome, which may or may not occur with syndactyly; Short QT syndrome or Brugada syndrome; Long QT syndrome or other arrhythmia without additional symptoms. [2] CACNA1C-related disorders are inherited in an autosomal dominant manner. [2]
Long QT syndrome, or LQTS, is when somebody’s QT interval is longer than normal, which should typically be less than half of a cardiac cycle. In fact, for a heart rate of 60 beats per minute, the QT interval’s generally considered to be abnormally long when it’s greater than 440 milliseconds in males or 460 milliseconds in females.
At just 19 years old, Eldiara Doucette — known on social media as "Bionic Barbie" — was diagnosed with synovial sarcoma, a rare form of soft tissue cancer that affects only 1,000 people per ...
The term "torsades de pointes" is translated from French as "twisting of the peaks" because the complexes appear to undulate, or twist around, the EKG baseline. TdP can be acquired by inheritance of a congenital long QT syndrome, or more commonly from the ingestion of a pharmacologic drug. During TdP episodes, patients have a heart rate of 200 ...