Investigations

• event recorders ^a

Why?

• Event recorders produce more interpretable ECG tracings with symptoms and detect more clinically important arrhythmias than 48 hours of Holter monitoring ^a
• Event monitoring is cheaper ^a

Event recorders detect more clinically important arrhythmias than Holter monitoring

Patient	Treatment	Comparison	Outcome	CER	RRR (95% CI)	NNT (95% CI)
palpitations a	event recorder for up to 3 months or until 2 events detected	Holter monitoring for 48 hours	interpretable ECG tracing at 3 months	35%	93% (36% to 100%)	3 (2 to 8)
			clinically important arrhythmia detected	0%		5 (3 to 14)