Performance at altitude and angiotensin I-converting enzyme genotype.

The "insertion" (I) rather than "deletion" (D) variant of the human angiotensin-converting enzyme (ACE) gene is associated with both lower tissue ACE activity and elite performance at high altitude. We examined whether the onset of acute mountain sickness (AMS), and further performance on reaching the summit of Mt. Blanc are influenced by the ACE I/D polymorphism. Two hundred and eighty-four climbers (235 males, [37.0 (11.0 years], (86 DD, 142 ID, 56 II)) had assessment of their AMS status upon arrival to the Gouter hut (3,807 m) on day 1, and again on day 2 after an attempted ascent to the summit of Mt. Blanc (4,807 m). Success in reaching the summit was genotype dependent (87.7% of DD, 94.9% of ID and 100% of II individuals; P=0.048); I allele frequency for those reaching the summit was 0.47 compared to 0.21 for those who did not (P=0.01). The onset of AMS on day 1 appeared to be dependent on genotype (P=0.003), but with those heterozygous being less affected. ACE genotype was not associated either with AMS onset or severity on day 2. Thus, ACE I/D genotype is associated with successful high altitude ascent in this prospective study-an association not explicable by genotype-dependence of AMS onset or severity. Values are given as mean (SD) unless otherwise stated.

Family witnessed resuscitation in UK emergency departments: a survey of practice.

BACKGROUND AND OBJECTIVES: The American Heart Association guidelines from 2000 recommend that family members be allowed to witness cardiopulmonary resuscitation. This is controversial and opponents fear litigation and family interference during family witnessed resuscitation (FWR). The extent of FWR in UK Emergency Departments is unknown. METHODS: A telephone survey of a selection of UK Emergency Departments was performed asking about experience with FWR. RESULTS: One-hundred-and-sixty-two UK Emergency Departments with an average attendance of 47,000 patients per year participated. FWR was allowed by 128 (79%) for an adult patient and 93% for a child. Of these, 50% invited relatives to witness and only 21% did not permit FWR. The perceived benefits were: accepting that all possible has been done (48%), accepting the death (48%) and help with grieving (38%). Two percent did not think FWR was of help. Few had encountered any problems or interference from the family. Never being asked was the commonest reason not allowing FWR followed by staff reluctance. Most respondents would wish to be present if their child (85%), spouse/partner (64%) or elderly relative (52%) was being resuscitated. CONCLUSIONS: FWR is common in UK Emergency Departments. It is more common when children are being resuscitated than adults. Further research is needed to demonstrate whether it is of benefit to the patient or relatives and its applicability to other areas such as intensive care.