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Recent studies of atropine during critical care intubation (CCI) have revealed that neonates frequently experience bradycardia, are infrequently affected by ventricular arrhythmias and conduction disturbances and deaths have not been reported in a series of studies. The indiscriminate use of atropine is unlikely to alter the outcome during neonatal CCI other than reducing the frequency of sinus tachycardia. In contrast, older children experience a similar frequency of bradycardia to neonates and are more frequently affected by ventricular arrhythmias and conduction disturbances. Mortality during CCI is in the order of 0.5%. Atropine has a beneficial effect on arrhythmias and conduction disturbances and may reduce paediatric intensive care unit mortality. The use of atropine for children >1 month of age may positively influence outcomes beyond a reduction in the frequency of sinus bradycardia. There is indirect evidence that atropine should be used for intubation during sepsis. Atropine should be considered when using suxamethonium. The reliance on heart rate as the sole measure of haemodynamic function during CCI is no longer justifiable. Randomised trials of atropine for mortality during CCI in general intensive care unit populations are unlikely to happen. As such, future research should be focused on establishing of a gold standard for haemodynamic decompensation for CCI. Cardiac output or blood pressure are the most likely candidates. The 'lost beat score' requires development but has the potential to be developed to provide an estimation of risk of haemodynamic decompensation from ECG data in real time during CCI. [ABSTRACT FROM AUTHOR]

OBJECTIVES: To determine whether vital signs identify children with serious infections, and to compare their diagnostic value with that of the Manchester triage score (MTS) and National Institute for Health and Clinical Excellence (NICE) traffic light system of clinical risk factors. DESIGN: Prospective cohort of children presenting with suspected acute infection. We recorded vital signs, level of consciousness, activity level, respiratory distress, hydration and MTS category. SETTING: Paediatric assessment unit at a teaching hospital in England. PARTICIPANTS: 700 children (median age 3 years), of whom 357 (51.0%) were referred from primary care, 198 (28.3%) self-referrals and 116 (16.6%) emergency ambulance transfers. Just over half (383 or 54.7%) were admitted. MAIN OUTCOME MEASURES: Severity of infection categorised as serious, intermediate, minor or not infection. RESULTS: Children with serious or intermediate infections (n = 313) were significantly more likely than those with minor or no infection (n = 387) to have a temperature 39°C, tachycardia, saturations 94% or capillary refill time (CRT) >2 seconds. Having one or more of temperature 39°C, saturations 94%, tachycardia and tachypnoea was 80% (95% CI 75% to 85%) sensitive and 39% (95% CI 34% to 44%) specific for serious or intermediate infection. This was comparable to the MTS score (84% sensitive, 38% specific), and the NICE traffic light system (85% sensitive, 29% specific). CONCLUSIONS: A combination of vital signs can be used to differentiate children with serious infections from those with less serious infections in a paediatric assessment unit and has comparable sensitivity to more complicated triage systems. The diagnostic value of combined vital signs and the NICE traffic light system remains to be determined in populations where the prevalence of severe illness is much lower. [ABSTRACT FROM AUTHOR]

This article highlights the applied science intrinsic to the interpretation of the electrocardiogram and cardiac arrhythmias in children. Like all living cells, the inside of the cardiac myocyte has a negative charge. This results in a voltage difference across the cell membrane called the trans-membrane potential. Unlike most other cells, cardiac myocytes are excitable. When appropriately stimulated, channels in the cell membrane open, allowing ions to flow across the cell membrane. This results in the cardiac action potential.