“…The presence of some significant arrhythmias, defined as prolonged asystole, or high-grade second-degree atrioventricular (AV) block or third-degree AV block, rapid supraventricular tachycardias (SVT), or VT, when correlated with symptoms, is considered as diagnostic. [74][75][76][77] In contrast, the absence of arrhythmia during monitoring while a syncopal episode occurs is also helpful and virtually excludes an arrhythmic cause. With the exception of some abnormalities, such as an asystolic pause of more than 3 seconds or an episode of SVT/VT, the interpretation of asymptomatic arrhythmias detected on continuous monitoring is controversial.…”