STUDY OBJECTIVE: There is little evidence that cardiopulmonary resuscitation (CPR) alone may lead to the resuscitation of @entity1167 victims with other than respiratory causes (eg, pediatric arrest, drowning, @entity1445 ). The objective of this study was to identify out-of-hospital @entity1167 or advanced cardiac life support. METHODS: This observational cohort included all adult survivors of out-of-hospital @entity1167 of a cardiac cause from phases I and II of the Ontario Prehospital Advanced Life Support Study. During the study period, the system provided a basic life support/defibrillation level of care but no advanced life support. CPR-only @entity1 were @entity1 determined to be without vital signs by EMS personnel who regained a palpable pulse in the field with precordial thump or CPR only and then were admitted alive to the hospital. Six members of a 7-member expert review panel had to rate the @entity1 as either probably or definitely having an out-of-hospital @entity1167 , and a rhythm strip consistent with a @entity1167 had to be present to be considered a @entity1 . Criteria considered were witness status, citizen or first responder CPR, CPR duration, arrest rhythm and rate, and performance of precordial thump. RESULTS: From January 1, 1991, to June 30, 1997, 9,667 @entity1 with out-of-hospital @entity1167 were treated. The overall survival rate to hospital discharge was 4.6%. There were 97 apparent CPR-only @entity1 admitted to the hospital. Application of the inclusion criteria yielded 24 CPR-only @entity1 who had true out-of-hospital @entity1167 and 73 @entity1 judged not to have @entity1167 . Of the 24 true CPR-only @entity1 admitted to the hospital, 15 @entity1 were discharged alive, 10 @entity1 were witnessed by bystanders, and 7 @entity1 were witnessed by EMS personnel. The initial arrest rhythm was pulseless electrical activity in 9 @entity1 , @entity1167 in 12 @entity1 , and @entity1165 in 3 @entity1 . One @entity1 with @entity1165 converted to @entity7129 with a single precordial thump. CONCLUSION: CPR-only survivors of true out-of-hospital @entity1167 do exist; some victims of out-of-hospital @entity1167 of primary cardiac cause can survive after provision of out-of-hospital basic life support care only. However, many @entity1 found to be pulseless by means of out-of-hospital evaluation likely did not have a true @entity1167 . This has implications for the survival rates of most, if not all, previous @entity1167 reports. Survival rates from @entity1167 may actually be lower if one excludes survivors who never had a true arrest. The absence of vital signs by out-of-hospital assessment alone is not adequate to include @entity1 in research reports or quality evaluations for @entity1167 .

CPR-only survivors of out-of-hospital @entity1167 : implications for out-of-hospital care and XXXX research methodology.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity1165 :: ('MESH:D017180', 'Disease') :: ['ventricular tachycardia'] @entity1167 :: ('MESH:D006323', 'Disease') :: ['cardiac arrest', 'asystole', 'cardiac arrest survivors resuscitated without defibrillation', 'cardiac arrest rhythm'] @entity7129 :: ('MESH:D013616', 'Disease') :: ['sinus tachycardia'] @entity1445 :: ('MESH:D062787', 'Disease') :: ['drug overdose']
@entity1167 :: (MESH:D006323,Disease) :: ['cardiac arrest']
