3. RESULTS
A total of 6280 ECGs were identified. These ECGs belonged to 5056 patients. Due to several reasons a total of 1337 were excluded. There were 744 ECGs excluded due to repetition in the same emergency episode. Furthermore, 636 ECGs were excluded (74 due to pacemaker rhythm, 12 due to bad quality and 550 due to AF/arrhythmias). No patients with prior diagnosis of LQTS were identified. A total of 383 ECGs with prolonged QTc were recognized (figure 1). The total prevalence of aLQTS was 7.81%.
Patients with aLQTS were more commonly detected in men (n= 204; 53.3%) with an average age of 73.49 ± 14.79 years old (range 19 to 95) and average QTc interval of 505.3 ± 32.4ms (470-680ms). The majority of patients were asymptomatic (n= 305; 79.6%) and the most common symptom was syncope (39; 50%) followed by pre-syncope (n= 22; 28.2%). No TdP or pVF were documented. Baseline characteristics are shown in table 1