Medical conditions, such as eating disorders, thyroid disease, or serious diarrhea or vomiting, that cause low blood levels of potassium, magnesium, or calcium.Heart conditions such as cardiomyopathy and congenital heart defects.A family history of LQTS, or if someone in your family has had unexplained fainting or seizures, drowning or near drowning, or unexplained sudden death.The following factors can raise your risk of LQTS: This means you are not born with the disorder but develop it during your lifetime. , which means you are born with the condition and have it your whole life. This may disrupt electrical activity in the heart’s lower chambers, or ventricles, and cause dangerous arrhythmias. In people who have LQTS, the ion channels may not work well, or there may be too few of them. This generates the heart’s electrical activity. Ion channels open and close to let electrically charged sodium, calcium, and potassium atoms (ions) flow into and out of each cell. On the surface of each heart muscle cell are tiny pores called ion channels. When they do occur, though, they can be fatal. LQTS is rare, and not everyone who has LQTS has dangerous heart rhythms. A nurse monitors the painless procedure.Ī long QT interval can upset the careful timing of the heartbeat and cause sudden uncontrollable fast heart rhythms. In Figure B, a patient lies in a bed with EKG electrodes attached to his chest, upper arms, and legs. In Figure A, a normal heart rhythm recording shows the electrical pattern of a regular heartbeat. However, in people who have LQTS, the QT interval lasts longer than normal.ĮKG The image shows the standard setup for an EKG. Normally the time between the Q wave and the T wave is about a third of each heartbeat cycle. This interval shows electrical activity in the heart’s lower chambers, called the ventricles. The electrical activity that occurs between the Q and T waves is called the QT interval. Each heartbeat is mapped as five separate electrical waves: P, Q, R, S, and T. ![]() Information from the EKG is mapped on a graph so your doctor can study your heart’s electrical activity. An EKG is a test that detects and records your heart’s electrical activity. ![]() The term “long QT” refers to a problem with the pattern seen on an electrocardiogram (EKG). A conduction disorder is a problem with the electrical system that controls your heartbeat. Long QT syndrome (LQTS) is a type of conduction disorder.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |