Arrhythmic syncope: From diagnosis to management

Table 1 Main cardiac causes of syncope

Cardiac syncope
Arrhythmic causes	Bradyarrhythmia	Sick sinus syndrome/sinus node disfunction
		Atrioventricular block
	Tachyarrhythmia	Supraventricular tachycardia (AVNRT, AVRT, AT, fast AF, etc.)
		Ventricular arrhythmias	Related to structural heart disease
			Channelopathies and inherited arrhythmia syndromes
Non-arrhythmic causes	Mechanical causes	Valvulopathies (aortic stenosis, mitral stenosis, etc.)
		HCM
		Atrial myxoma
		Pulmonary emboli
		Tamponade
		Severe pulmonary hypertension
Acute coronary syndrome

AVNRT: Atrioventricular nodal re-entrant tachycardia; AVRT: Atrioventricular re-entrant tachycardia; HCM: Hypertrophic cardiomyopathy; AF: Atrial fibrillation; AT: Atrial tachycardia.