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Table 5 Studies of subsequent shock in patients with initially nonshockable rhythms

From: Subsequent shock deliveries are associated with increased favorable neurological outcomes in cardiac arrest patients who had initially non-shockable rhythms

  Hallstrom et al. [11] Herlitz et al. [14] Kajino et al. [15] Olasveemgen et al. [16] Thomas et al. [12] Goto et al. [17] SOS-KANTO Study Group [18]
Published year 2007 2008 2008 2009 2013 2014 2015
Sample size (n) 738 22,465 12,353 753 6556 569,937 11,481
Response time (minutes) 6.0 ± 2.6 7 a 6.0 ± 2.3 7 (3–11) a 7 (5–9)a 8.2 ± 3.8
Shock delivery timeb (minutes) 21.0 ± 8.1 12.3 ± 6.9 20 (15–27)a 13.0 ± 9.8
Country USA Sweden Japan Norway USA Japan Japan
Subsequent shock (%) 22.2 26.0 3.9 13.0 18.9 4.8 4.5
Association of subsequent shock with outcomesc Unfavorable outcomes Favorable outcomes Favorable outcomes Favorable outcomes No difference Favorable outcomes Favorable outcomes
  1. aData are median (interquartile range) for continuous variables
  2. bShock delivery time was the interval from the initiation of CPR by EMS providers to the first shock delivery by EMS providers
  3. cAssociation of subsequent shock with increased unfavorable or favorable clinical outcome
  4. CPR, cardiopulmonary resuscitation, EMS emergency medical service, SOS-KANTO, survey of survivors after out-of-hospital cardiac arrest in the Kanto region