Resuscitation
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Comparative Study
Rhythm changes during resuscitation from ventricular fibrillation in relation to delay until defibrillation, number of shocks delivered and survival.
To describe rhythm changes during the initial phase of resuscitation from ventricular fibrillation in relation to the interval between collapse and defibrillation, to survival and to bystander-initiated cardiopulmonary resuscitation (CPR). ⋯ Among patients who suffer out-of-hospital cardiac arrest and are found in ventricular fibrillation, there is a strong relationship between survival and initial rhythm changes after defibrillation. These rhythm changes are directly related to the interval between collapse and the first defibrillation.
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Randomized Controlled Trial Clinical Trial
Active compression-decompression cardiopulmonary resuscitation in standing position over the patient: pros and cons of a new method.
Active compression-decompression cardiopulmonary resuscitation (ACD-CPR) has been introduced to improve outcome of CPR after cardiac arrest. Usually, ACD-CPR is performed with the rescuer kneeling beside the patient (ACD-B), but ACD-CPR with the rescuer in standing position (ACD-S) has been taught and applied in some centres in addition to conventional ACD-CPR (ACD-B). The aim of this randomised and cross-over study was to evaluate the new technique of ACD-S and to compare it with conventional ACD-B. ⋯ Compression forces decreased in ACD-S from 55.1 to 48.9 kp (P = 0.002) and in ACD-B from 52.8 to 47.0 kp (P = 0.069). We conclude that ACD-CPR in standing position can be considered equal to ACD-B in view of maximal duration of CPR, exhaustion of the rescuers and decompression forces. The decrease of compression forces in ACD-S and ACD-B as well as the difference between compression forces in ACD-S and ACD-B seem to be of no clinical relevance, and exhaustion was judged to be similar despite oxygen consumption being higher in ACD-S than in ACD-B.
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Comparative Study
Evaluation of cardiopulmonary resuscitation skills of general practitioners using different scoring methods.
In this study we evaluated the practical performance of 70 general practitioners in cardiopulmonary resuscitation (CPR) before and after instruction and compared checklist-based scores to mechanical recording scores in order to investigate which scoring method is preferable. Both checklist and recording strip-based scores showed significant improvement after instruction, but only 37% were judged proficient according to the American Heart Association standards (checklist scoring), and 47% according to the recording print-based scoring system, while rates judged 97% as satisfactory by general impression. Interrater reliability was highest for the recording print (0.97) and lower for the checklist (0.79), especially for CPR performance (0.56). ⋯ These results support the use of the recording manikin as compared with the use of a checklist for formative evaluation of basic life support skills. However, as proficiency in diagnosis and performance in CPR are poorly correlated, assessment of diagnosis using a checklist must be included. Therefore we strongly recommend the combination of assessment by observers using a checklist for diagnostic procedures and the recording strip of the manikin for performance of CPR, as employed in most evaluation schemes.
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Comparative Study
The cerebral 'no-reflow' phenomenon after cardiac arrest in rats--influence of low-flow reperfusion.
Experimental data indicate that early microcirculatory reperfusion is disturbed after cardiac arrest. We investigated the influence of prolonged cardiac arrest and basic life support (BLS) procedures on the quality of cerebral microcirculatory reperfusion. ⋯ Wistar rats did not develop a marked cerebral 'no-reflow' phenomenon after circulatory arrest. A relevant degree of cerebral 'no-reflow' occurred, however, in animals subjected to a phase of BLS before circulatory stabilization. Therefore, low-flow states following prolonged cardiocirculatory arrest may aggravate early cerebral microcirculatory reperfusion disorders.