Table 29Event rates used to describe the distribution of arrhythmias

ParameterEvent rateNumber of studies
Proportion of arrhythmias during TLoC that are bradyarrhythmias406/550 = 0.743112,14,25,37–39,50,58,70,73,76,80,87,113,116,119–122, 130, 131,137, 144, 160,170,171,183,184,189, 196,197
Proportion of bradyarrhythmias during TLoC that are:2012,14,25,37–39,58,70,73,87, 119,120,130,131,137, 144,170,171,183,189
 • AV block106/279 = 0.38
 • Sick sinus syndrome157/279 = 0.56
 • Other bradycardias16/279 = 0.06
Proportion of tachyarrhythmias during TLoC that are:2712,14,25,37–39, 50,58,70,73,76,80,87,116,119, 120,122,130,131,137,160,170,171,183,189,196,197
 • VT during syncope38/141=0.27
 • Other tachycardias103/141 = 0.73
Proportion of arrhythmias not during TLoC that are bradyarrhythmias63/129 =0.49825,38,39,50,80,113,120,183
Proportion of bradyarrhythmias not during TLoC that are:825,38,39,50,80,113,120,183
 • Complete AV block16/63 = 0.23
 • Asystole >3s44/63 = 0.64
 • Other bradycardias9/63 = 0.13
Proportion of tachyarrhythmias not during TLoC that are:825,38,39,50,80,113,120,183
 • Sustained VT25/66 =0.38
 • Other Tachycardias41/66 = 0.62

From: 5, Specialist assessment and diagnosis

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NICE Clinical Guidelines, No. 109.
National Clinical Guideline Centre for Acute and Chronic Conditions (UK).
Copyright © National Clinical Guideline Centre for Acute and Chronic Conditions, 2010.

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