Circulation
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Comparative Study
Influence of implantable cardioverter-defibrillators on the long-term prognosis of survivors of out-of-hospital cardiac arrest.
Survivors of out-of-hospital cardiac arrest not associated with acute myocardial infarction are at high risk for recurrent cardiac arrest and sudden cardiac death. The impact of the implantable cardioverter-defibrillator on long-term prognosis in these patients is uncertain. ⋯ In survivors of out-of-hospital cardiac arrest, the implantable defibrillator is associated with a reduction in cardiac mortality, particularly in patients with impaired left ventricular function.
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Comparative Study
The ability of several short-term measures of RR variability to predict mortality after myocardial infarction.
We studied 715 patients 2 weeks after myocardial infarction to test the hypothesis that short-term power spectral measures of RR variability (calculated from 2 to 15 minutes of normal RR interval data) will predict all-cause mortality or arrhythmic death. ⋯ Power spectral measures of RR variability calculated from short (2 to 15 minutes) ECG recordings are remarkably similar to those calculated over 24 hours. The power spectral measures of RR variability are excellent predictors of all-cause mortality and sudden cardiac death.
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Comparative Study
Effects of active compression-decompression resuscitation on myocardial and cerebral blood flow in pigs.
This study was designed to assess the effects of a modified cardiopulmonary resuscitation (CPR) technique that consists of both active compression and active decompression of the chest (ACD CPR) versus standard CPR (STD CPR) on myocardial and cerebral blood flow during ventricular fibrillation both before and after epinephrine administration. ⋯ We conclude that ACD CPR significantly increases myocardial and cerebral blood flow during cardiac arrest in the absence of vasopressor therapy compared with STD CPR: