3.3 Diagnostic yield
Arrhythmogenic diagnosis, clinically relevant to the index syncope was
diagnosed in 83 of 309 (27%) of patients (Table 2). Type of
arrhythmogenic diagnosis in those patients are listed in Table 2. Sick
sinus syndrome was present in 60 (72%) of these 83 patients,
atrioventricular block (being Mobitz type 2 2nd degree
AV block or 3rd degree AV block) in 17 patients (20%)
and ventricular tachycardia in 6 (7%). Of those patients with an
arrhythmogenic diagnosis, 66 patients (79%) received a pacemaker, and 7
patients (8%) an ICD. The remaining 10 patients (12%) did not receive
device implantation based on clinical decision making. Besides etiologic
diagnoses explaining syncope, additional diagnoses (mostly atrial
fibrillation or atrial flutter) were found as well in 58 patients
(18.8% of the study population).