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