Adrenergic dependent torsades despointes ventricular tachycardia (ADTdpVT) is a genetic defect caused by multiple ion channel abnormalities due to multiple genetic mutations, resulting in prolonged Q-T interval, recurrent TDP, recurrent syncope and sudden death. ADTdp is genetically heterogeneous and at least six LQTS (LQT1 to LQT6) mutant loci are known to be autosomal dominant, of which five have been localized on chromosomes and four have established associated mutant genes. jLNS belongs to LQT1 and the associated mutant gene is KVLQT1. when jLNS When both parents of JLNS patients contain KVLQT1, and the abnormal gene is inherited from both parents as a pure gene, KVLQT1 makes the heart ion channel function abnormal, i.e., the potassium channel regulation function abnormal. It makes myocardial repolarization significantly delayed as Q-T interval significantly prolonged, and is autosomal dominant. KVLQT1 also encodes the hearing component and causes congenital hearing abnormalities and deafness, which is autosomal recessive. Because the conditions that form JLNS are so specific, JLNS is rare. Other types of LQT constitute RWS, so RWS is caused by multiple genetic defects and is autosomal dominant. Its known related genes are LQT2, LQT3 (HERG), LQT4 (SCN5A), LQT5, and LQT6 (KCNE4). Examination for adrenergic dependence: In mild cases, there is no loss of consciousness, only blackness and vertigo, and there may be blurred vision, apprehension, moaning and shouting. In severe cases, syncope, loss of consciousness, convulsions, urinary incontinence, and sudden death occur and are easily misdiagnosed as epilepsy. Electrocardiogram: The heart is excited by the pacing point, atria, and ventricles successively during each cardiac cycle, accompanied by bioelectrical changes, and the graphs of various forms of potential changes (referred to as ECG) are elicited from the body surface through an electrocardiographic tracer. ECG is an objective indicator of the process of occurrence, propagation and recovery of cardiac excitation. ECG is the earliest, most commonly used and most basic diagnostic method in the diagnosis of coronary heart disease. Doppler echocardiography: Doppler echocardiography: There are many red blood cells within the blood, which reflect and scatter ultrasound and can be considered as a tiny source of sound. The probe is placed in the intercostal space and does not move while emitting ultrasound. When red blood cells flow in the heart or large blood vessels, the sound frequency scattered by the red blood cells changes. When the red blood cells move toward the probe, the reflected sound frequency increases, and vice versa, it decreases. This difference in sound frequency between the red blood cells and the probe in relative motion is called the Doppler shift. It shows the speed and direction of blood flow and the nature of the blood flow. Doppler echocardiography is divided into pulsed Doppler echocardiography, continuous wave Doppler echocardiography, and color Doppler echocardiography. The most commonly used is pulsed Doppler echocardiography, which provides a real-time Doppler spectrogram of blood flow at any point in the heart with two-dimensional image monitoring and positioning. Lactate dehydrogenase test: Lactate dehydrogenase is a glycolytic enzyme. Lactate dehydrogenase is found in the cytoplasm of all tissues of the body, with high levels in the kidney. Lactate dehydrogenase is the enzyme that catalyzes the production of lactate from pyruvate and is present in almost all tissues. There are six forms of the isoenzyme, namely LDH-1 (H4), LDH-2 (H3M), LDH-3 (H2M2), LDH-4 (HM3), LDH-5 (M4) and LDH-C4, which can be separated by electrophoresis.The distribution of LDH isoenzyme has obvious tissue specificity, so it can be used to diagnose diseases by concordance with its tissue specificity. In normal human serum, LDH2〉LDH1. if there is release of cardiac enzymes into the blood, LDH1〉LDH2, and this index can be used to observe and diagnose myocardial diseases.