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Table 2 Initial area at risk, infarct size and salvage index according to the time-of-day at symptom onset

From: Time-of-day at symptom onset was not associated with infarct size and long-term prognosis in patients with ST-segment elevation myocardial infarction

Parameter Time-of-day p-value
0–6 h 6–12 h 12–18 h 18–24 h
Initial area at risk (% of the LV) 23.0 [13.4–39.0] 24.0 [13.0–43.0] 25.0 [12.6–43.0] 22.0 [10.0–37.6] 0.25
Infarct size (% of LV) 10.0 [3.0–24.7] 10.0 [3.0–24.0] 10.0 [3.0–22.0] 9.0 [3.0–21.0] 0.87
Salvage index 0.49 [0.19–0.81] 0.52 [0.27–0.82] 0.50 [0.25–0.82] 0.50 [0.24–0.75] 0.53
  1. Data are median with 25th–75th percentiles. Salvage index shows the proportion of initial area at risk salvaged by reperfusion of the initial myocardial area at risk