Long QT Syndrome (LQTS) can indeed lead to serious heart complications, particularly if it is not diagnosed or managed properly. The primary risk associated with LQTS is the development of dangerous arrhythmias, or irregular heart rhythms, which can disrupt the heart’s ability to pump blood effectively. The most significant arrhythmia associated with LQTS is called torsades de pointes, a type of ventricular tachycardia that can cause the heart to beat erratically and inefficiently. If not treated quickly, these arrhythmias can progress to more severe conditions, such as ventricular fibrillation or sudden cardiac arrest, both of which are life-threatening emergencies.

In addition to arrhythmias, individuals with LQTS may also experience fainting, dizziness, or syncope, which can occur when the heart’s electrical system misfires and reduces blood flow to the brain. These episodes can lead to injury if they occur during physical activity or while performing other tasks. Over time, if left untreated, the strain caused by frequent arrhythmias can weaken the heart muscle, potentially leading to heart failure. It is also important to note that some forms of LQTS can increase the risk of sudden cardiac death, particularly in younger individuals or those who have a family history of early heart-related deaths. Early diagnosis, monitoring, and intervention are critical in managing these risks and preventing the occurrence of life-threatening complications.